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Solution
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Q.1 Correct
Q.1 In-correct
Q.1 Unattempt

A parallel plate capacitor of area $A=16 \mathrm{~cm}^2$ and separation between the plates 10 cm , is charged by a DC current. Consider a hypothetical plane surface of area $\mathrm{A}_0=3.2 \mathrm{~cm}^2$ inside the capacitor and parallel to the plates. At an instant, the current through the circuit is 6A. At the same instant the displacement current through $\mathrm{A}_0$ is __________ mA .



JEE Main 2025 (Online) 22nd January Evening Shift

A parallel plate capacitor of area $A=16 \mathrm{~cm}^2$ and separation between the plates 10 cm , is charged by a DC current. Consider a hypothetical plane surface of area $\mathrm{A}_0=3.2 \mathrm{~cm}^2$ inside the capacitor and parallel to the plates. At an instant, the current through the circuit is 6A. At the same instant the displacement current through $\mathrm{A}_0$ is __________ mA .



JEE Main 2025 (Online) 22nd January Evening Shift
Q.2 Correct
Q.2 In-correct
Q.2 Unattempt

A time varying potential difference is applied between the plates of a parallel plate capacitor of capacitance $2.5 \mu \mathrm{~F}$. The dielectric constant of the medium between the capacitor plates is 1 . It produces an instantaneous displacement current of 0.25 mA in the intervening space between the capacitor plates, the magnitude of the rate of change of the potential difference will be _________ $\mathrm{Vs}^{-1}$.



JEE Main 2025 (Online) 23rd January Evening Shift

A time varying potential difference is applied between the plates of a parallel plate capacitor of capacitance $2.5 \mu \mathrm{~F}$. The dielectric constant of the medium between the capacitor plates is 1 . It produces an instantaneous displacement current of 0.25 mA in the intervening space between the capacitor plates, the magnitude of the rate of change of the potential difference will be _________ $\mathrm{Vs}^{-1}$.



JEE Main 2025 (Online) 23rd January Evening Shift
Q.3 Correct
Q.3 In-correct
Q.3 Unattempt

A plane electromagnetic wave propagating in x-direction is described by

[27-Jan-2024 Shift 1]

A plane electromagnetic wave propagating in x-direction is described by

[27-Jan-2024 Shift 1]
Q.4 Correct
Q.4 In-correct
Q.4 Unattempt

An object is placed in a medium of refractive index 3. An electromagnetic wave of intensity 6 × 108W∕m2 falls normally on the object and it is absorbed completely. The radiation pressure on the object would be (speed of light in free space = 3 × 108m∕ s):

[27-Jan-2024 Shift 2]

An object is placed in a medium of refractive index 3. An electromagnetic wave of intensity 6 × 108W∕m2 falls normally on the object and it is absorbed completely. The radiation pressure on the object would be (speed of light in free space = 3 × 108m∕ s):

[27-Jan-2024 Shift 2]
Q.5 Correct
Q.5 In-correct
Q.5 Unattempt

A plane electromagnetic wave of frequency 35MHz travels in free space along the X-direction. At a particular point (in space and time)  The value of magnetic field at this point is :

[29-Jan-2024 Shift 2]

A plane electromagnetic wave of frequency 35MHz travels in free space along the X-direction. At a particular point (in space and time)  The value of magnetic field at this point is :

[29-Jan-2024 Shift 2]
Q.6 Correct
Q.6 In-correct
Q.6 Unattempt

The electric field of an electromagnetic wave in free space is represented as 

The corresponding magnetic induction vector will be :

[30-Jan-2024 Shift 1]

The electric field of an electromagnetic wave in free space is represented as 

The corresponding magnetic induction vector will be :

[30-Jan-2024 Shift 1]
Q.7 Correct
Q.7 In-correct
Q.7 Unattempt

Match List I with List II

Choose the correct answer from the options given below:

[30-Jan-2024 Shift 2]

Match List I with List II

Choose the correct answer from the options given below:

[30-Jan-2024 Shift 2]
Q.8 Correct
Q.8 In-correct
Q.8 Unattempt

In a plane EM wave, the electric field oscillates sinusoidally at a frequency of 5 × 1010Hz and an amplitude of 50Vm−1. The total average energy density of the electromagnetic field of the wave is : [Use ε0 = 8.85 × 10−12C2∕Nm2]

[31-Jan-2024 Shift 1]

In a plane EM wave, the electric field oscillates sinusoidally at a frequency of 5 × 1010Hz and an amplitude of 50Vm−1. The total average energy density of the electromagnetic field of the wave is : [Use ε0 = 8.85 × 10−12C2∕Nm2]

[31-Jan-2024 Shift 1]
Q.9 Correct
Q.9 In-correct
Q.9 Unattempt

Given below are two statements:

Statement I: Electromagnetic waves carry energy as they travel through space and this energy is equally shared by the electric and magnetic fields.
Statement II: When electromagnetic waves strike a surface, a pressure is exerted on the surface.

In the light of the above statements, choose the most appropriate answer from the options given below:

[31-Jan-2024 Shift 2]

Given below are two statements:

Statement I: Electromagnetic waves carry energy as they travel through space and this energy is equally shared by the electric and magnetic fields.
Statement II: When electromagnetic waves strike a surface, a pressure is exerted on the surface.

In the light of the above statements, choose the most appropriate answer from the options given below:

[31-Jan-2024 Shift 2]
Q.10 Correct
Q.10 In-correct
Q.10 Unattempt

If frequency of electromagnetic wave is 60MHz and it travels in air along z direction then the corresponding electric and magnetic field vectors will be mutually perpendicular to each other and the wavelength of the wave (in m ) is :

[1-Feb-2024 Shift 2]

If frequency of electromagnetic wave is 60MHz and it travels in air along z direction then the corresponding electric and magnetic field vectors will be mutually perpendicular to each other and the wavelength of the wave (in m ) is :

[1-Feb-2024 Shift 2]
Q.11 Correct
Q.11 In-correct
Q.11 Unattempt
If
→
E
 and
→
K
 represent electric field and propagation vectors of the EM waves in vacuum, then magnetic field vector is given by : (ω− angular frequency) :
[24-Jan-2023 Shift 1]
If
→
E
 and
→
K
 represent electric field and propagation vectors of the EM waves in vacuum, then magnetic field vector is given by : (ω− angular frequency) :
[24-Jan-2023 Shift 1]
Q.12 Correct
Q.12 In-correct
Q.12 Unattempt
The electric field and magnetic field components of an electromagnetic wave going through vacuum is described by
Ex=E0sin‌(kz−ωt)
By=B0sin‌(kz−ωt)
Then the correct relation between E0 and B0 is given by
[24-Jan-2023 Shift 2]
The electric field and magnetic field components of an electromagnetic wave going through vacuum is described by
Ex=E0sin‌(kz−ωt)
By=B0sin‌(kz−ωt)
Then the correct relation between E0 and B0 is given by
[24-Jan-2023 Shift 2]
Q.13 Correct
Q.13 In-correct
Q.13 Unattempt
All electromagnetic wave is transporting energy in the negative z direction. At a certain point and certain time the direction of electric field of the wave is along positive y direction. What will be the direction of the magnetic field of the wave at that point and instant?
[25-Jan-2023 Shift 1]
All electromagnetic wave is transporting energy in the negative z direction. At a certain point and certain time the direction of electric field of the wave is along positive y direction. What will be the direction of the magnetic field of the wave at that point and instant?
[25-Jan-2023 Shift 1]
Q.14 Correct
Q.14 In-correct
Q.14 Unattempt
Which of the following are true?
A. Speed of light in vacuum is dependent on the direction of propagation.
B. Speed of light in a medium in independent of the wavelength of light.
C. The speed of light is independent of the motion of the source.
D. The speed of light in a medium is independent of intensity.
Choose the correct answer from the option given below :
[29-Jan-2023 Shift 1]
Which of the following are true?
A. Speed of light in vacuum is dependent on the direction of propagation.
B. Speed of light in a medium in independent of the wavelength of light.
C. The speed of light is independent of the motion of the source.
D. The speed of light in a medium is independent of intensity.
Choose the correct answer from the option given below :
[29-Jan-2023 Shift 1]
Q.15 Correct
Q.15 In-correct
Q.15 Unattempt
Given below are two statements:
Statement I : Electromagnetic waves are not deflected by electric and magnetic field.
Statement II : The amplitude of electric field and the magnetic field in electromagnetic waves are related to each other as E0=√‌
µ0
ε0
B0
In the light of the above statements, choose the correct answer from the options given below:
[29-Jan-2023 Shift 2]
Given below are two statements:
Statement I : Electromagnetic waves are not deflected by electric and magnetic field.
Statement II : The amplitude of electric field and the magnetic field in electromagnetic waves are related to each other as E0=√‌
µ0
ε0
B0
In the light of the above statements, choose the correct answer from the options given below:
[29-Jan-2023 Shift 2]
Q.16 Correct
Q.16 In-correct
Q.16 Unattempt
Match List-I with List-II.

Choose the correct answer from the option given below:
[31-Jan-2023 Shift 2]
Match List-I with List-II.

Choose the correct answer from the option given below:
[31-Jan-2023 Shift 2]
Q.17 Correct
Q.17 In-correct
Q.17 Unattempt
Match the List-I with List-II:

Choose the correct answer from the options given below:
[1-Feb-2023 Shift 1]
Match the List-I with List-II:

Choose the correct answer from the options given below:
[1-Feb-2023 Shift 1]
Q.18 Correct
Q.18 In-correct
Q.18 Unattempt
The ratio of average electric energy density and total average energy density of electromagnetic wave is:
[1-Feb-2023 Shift 2]
The ratio of average electric energy density and total average energy density of electromagnetic wave is:
[1-Feb-2023 Shift 2]
Q.19 Correct
Q.19 In-correct
Q.19 Unattempt
The energy density associated with electric field E and magnetic field B of an electromagnetic wave in free space is given by (ε0−. permittivity of free space, µ0 - permeability of free space)
[6-Apr-2023 shift 2]
The energy density associated with electric field E and magnetic field B of an electromagnetic wave in free space is given by (ε0−. permittivity of free space, µ0 - permeability of free space)
[6-Apr-2023 shift 2]
Q.20 Correct
Q.20 In-correct
Q.20 Unattempt
The waves emitted when a metal target is bombarded with high energy electrons are
[8-Apr-2023 shift 2]
The waves emitted when a metal target is bombarded with high energy electrons are
[8-Apr-2023 shift 2]
Q.21 Correct
Q.21 In-correct
Q.21 Unattempt
The amplitude of magnetic field in an electromagnetic wave propagating along y-axis is 6.0×10−7T. The maximum value of electric field in the electromagnetic wave is
[10-Apr-2023 shift 2]
The amplitude of magnetic field in an electromagnetic wave propagating along y-axis is 6.0×10−7T. The maximum value of electric field in the electromagnetic wave is
[10-Apr-2023 shift 2]
Q.22 Correct
Q.22 In-correct
Q.22 Unattempt
A plane electromagnetic wave of frequency 20‌MHz propagates in free space along x-direction. At a particular space and time,
→
E
=6.6
^
j
v∕m. What is
→
B
 at this point?
[11-Apr-2023 shift 2]
A plane electromagnetic wave of frequency 20‌MHz propagates in free space along x-direction. At a particular space and time,
→
E
=6.6
^
j
v∕m. What is
→
B
 at this point?
[11-Apr-2023 shift 2]
Q.23 Correct
Q.23 In-correct
Q.23 Unattempt
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : EM waves used for optical communication have longer wavelength than that of microwave, employed in Radar technology.
Reason R : Infrared EM waves are more energetic than microwaves, (used in Radar) In the light of given statements, choose the correct answer from the options given below.
[12-Apr-2023 shift 1]
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : EM waves used for optical communication have longer wavelength than that of microwave, employed in Radar technology.
Reason R : Infrared EM waves are more energetic than microwaves, (used in Radar) In the light of given statements, choose the correct answer from the options given below.
[12-Apr-2023 shift 1]
Q.24 Correct
Q.24 In-correct
Q.24 Unattempt
Which of the following Maxwell's equation is valid for time varying conditions but not valid for static conditions:
[13-Apr-2023 shift 1]
Which of the following Maxwell's equation is valid for time varying conditions but not valid for static conditions:
[13-Apr-2023 shift 1]
Q.25 Correct
Q.25 In-correct
Q.25 Unattempt
Given below are two statements :
Statement I : Out of microwaves, infrared rays and ultraviolet rays, ultraviolet rays are the most effective for the emission of electrons from a metallic surface.
Statement II : Above the threshold frequency, the maximum kinetic energy of photoelectrons is inversely proportional to the frequency of the incident light.
In the light of above statements, choose the correct answer form the options given below
[13-Apr-2023 shift 2]
Given below are two statements :
Statement I : Out of microwaves, infrared rays and ultraviolet rays, ultraviolet rays are the most effective for the emission of electrons from a metallic surface.
Statement II : Above the threshold frequency, the maximum kinetic energy of photoelectrons is inversely proportional to the frequency of the incident light.
In the light of above statements, choose the correct answer form the options given below
[13-Apr-2023 shift 2]
Q.26 Correct
Q.26 In-correct
Q.26 Unattempt
In an electromagnetic wave, at an instant and at a particular position, the electric field is along the negative z axis and magnetic field is along the positive x-axis. Then the direction of propagation of electromagnetic wave is :
[13-Apr-2023 shift 2]
In an electromagnetic wave, at an instant and at a particular position, the electric field is along the negative z axis and magnetic field is along the positive x-axis. Then the direction of propagation of electromagnetic wave is :
[13-Apr-2023 shift 2]
Q.27 Correct
Q.27 In-correct
Q.27 Unattempt
Match List I with List II of Electromagnetic waves with corresponding wavelength range :

Choose the correct answer from the options given below :
[15-Apr-2023 shift 1]
Match List I with List II of Electromagnetic waves with corresponding wavelength range :

Choose the correct answer from the options given below :
[15-Apr-2023 shift 1]
Q.28 Correct
Q.28 In-correct
Q.28 Unattempt
A plane electromagnetic wave travels in a medium of relative permeability 1.61 and relative permittivity 6.44. If magnitude of magnetic intensity is 4.5×10−2Am−1 at a point, what will be the approximate magnitude of electric field intensity at that point?
(Given : Permeability of free space µ0=4π×10−7NA−2, speed of light in vacuum c=3×108ms−1)
[24-Jun-2022-Shift-1]
A plane electromagnetic wave travels in a medium of relative permeability 1.61 and relative permittivity 6.44. If magnitude of magnetic intensity is 4.5×10−2Am−1 at a point, what will be the approximate magnitude of electric field intensity at that point?
(Given : Permeability of free space µ0=4π×10−7NA−2, speed of light in vacuum c=3×108ms−1)
[24-Jun-2022-Shift-1]
Q.29 Correct
Q.29 In-correct
Q.29 Unattempt
The electric field in an electromagnetic wave is given by E=56.5‌sin‌ω(t−x∕c)‌NC−1. Find the intensity of the wave if it is propagating along x-axis in the free space.
(Given : ε0=8.85×10−12C2N−1m−2 )
[25-Jun-2022-Shift-1]
The electric field in an electromagnetic wave is given by E=56.5‌sin‌ω(t−x∕c)‌NC−1. Find the intensity of the wave if it is propagating along x-axis in the free space.
(Given : ε0=8.85×10−12C2N−1m−2 )
[25-Jun-2022-Shift-1]
Q.30 Correct
Q.30 In-correct
Q.30 Unattempt
The electromagnetic waves travel in a medium at a speed of 2.0×108m∕s. The relative permeability of the medium is 1.0. The relative permittivity of the medium will be :
[25-Jun-2022-Shift-2]
The electromagnetic waves travel in a medium at a speed of 2.0×108m∕s. The relative permeability of the medium is 1.0. The relative permittivity of the medium will be :
[25-Jun-2022-Shift-2]
Q.31 Correct
Q.31 In-correct
Q.31 Unattempt
If Electric field intensity of a uniform plane electromagnetic wave is given as E=−301.6‌sin(kz−ωt)‌
∧
a
x+452.4‌sin(kz−ωt)‌
∧
a
y‌
V
m
. Then magnetic intensity ' H′ of this wave in Am−1 will be:
[Given : Speed of light in vacuum c=3×108ms−1, Permeability of vacuum .µ0=4π×10−7NA−2]
[26-Jun-2022-Shift-1]
If Electric field intensity of a uniform plane electromagnetic wave is given as E=−301.6‌sin(kz−ωt)‌
∧
a
x+452.4‌sin(kz−ωt)‌
∧
a
y‌
V
m
. Then magnetic intensity ' H′ of this wave in Am−1 will be:
[Given : Speed of light in vacuum c=3×108ms−1, Permeability of vacuum .µ0=4π×10−7NA−2]
[26-Jun-2022-Shift-1]
Q.32 Correct
Q.32 In-correct
Q.32 Unattempt
Which is the correct ascending order of wavelengths?
[26-Jun-2022-Shift-2]
Which is the correct ascending order of wavelengths?
[26-Jun-2022-Shift-2]
Q.33 Correct
Q.33 In-correct
Q.33 Unattempt

Choose the correct answer from the options given below:
[27-Jun-2022-Shift-1]

Choose the correct answer from the options given below:
[27-Jun-2022-Shift-1]
Q.34 Correct
Q.34 In-correct
Q.34 Unattempt
Given below are two statements:
Statement I : A time varying electric field is a source of changing magnetic field and vice-versa. Thus a disturbance in electric or magnetic field creates EM waves.
Statement II : In a material medium, the EM wave travels with speed v=‌
1
õ0E0
. In the light of the above statements, choose the correct answer from the options given below.
[27-Jun-2022-Shift-2]
Given below are two statements:
Statement I : A time varying electric field is a source of changing magnetic field and vice-versa. Thus a disturbance in electric or magnetic field creates EM waves.
Statement II : In a material medium, the EM wave travels with speed v=‌
1
õ0E0
. In the light of the above statements, choose the correct answer from the options given below.
[27-Jun-2022-Shift-2]
Q.35 Correct
Q.35 In-correct
Q.35 Unattempt
An EM wave propagating in x-direction has a wavelength of 8‌mm. The electric field vibrating y-direction has maximum magnitude of 60Vm−1. Choose the correct equations for electric and magnetic fields if the EM wave is propagating in vacuum :
[28-Jun-2022-Shift-2]
An EM wave propagating in x-direction has a wavelength of 8‌mm. The electric field vibrating y-direction has maximum magnitude of 60Vm−1. Choose the correct equations for electric and magnetic fields if the EM wave is propagating in vacuum :
[28-Jun-2022-Shift-2]
Q.36 Correct
Q.36 In-correct
Q.36 Unattempt
The intensity of the light from a bulb incident on a surface is 0.22W∕m2. The amplitude of the magnetic field in this light-wave is _____×10−9T
(Given : Permittivity of vacuum E0=8.85×10−12c2N−1−m−2, speed of light in vacuum c=3×108ms−1 )
[29-Jun-2022-Shift-1]
The intensity of the light from a bulb incident on a surface is 0.22W∕m2. The amplitude of the magnetic field in this light-wave is _____×10−9T
(Given : Permittivity of vacuum E0=8.85×10−12c2N−1−m−2, speed of light in vacuum c=3×108ms−1 )
[29-Jun-2022-Shift-1]
Q.37 Correct
Q.37 In-correct
Q.37 Unattempt
Light wave travelling in air along x-direction is given by Ey=540‌sin‌π×104(x−ct)Vm−1. Then, the peak value of magnetic field of wave will be (Given c=3×108ms−1 )
[25-Jul-2022-Shift-2]
Light wave travelling in air along x-direction is given by Ey=540‌sin‌π×104(x−ct)Vm−1. Then, the peak value of magnetic field of wave will be (Given c=3×108ms−1 )
[25-Jul-2022-Shift-2]
Q.38 Correct
Q.38 In-correct
Q.38 Unattempt
The magnetic field of a plane electromagnetic wave is given by :
→
B
=2×10−8‌sin(0.5×103x+1.5×1011t)‌
∧
j
‌T
The amplitude of the electric field would be :
[26-Jul-2022-Shift-1]
The magnetic field of a plane electromagnetic wave is given by :
→
B
=2×10−8‌sin(0.5×103x+1.5×1011t)‌
∧
j
‌T
The amplitude of the electric field would be :
[26-Jul-2022-Shift-1]
Q.39 Correct
Q.39 In-correct
Q.39 Unattempt
The oscillating magnetic field in a plane electromagnetic wave is given by By=5×10−6‌sin‌1000‌π(5x−4×108t)‌T. The amplitude of electric field will be :
[26-Jul-2022-Shift-2]
The oscillating magnetic field in a plane electromagnetic wave is given by By=5×10−6‌sin‌1000‌π(5x−4×108t)‌T. The amplitude of electric field will be :
[26-Jul-2022-Shift-2]
Q.40 Correct
Q.40 In-correct
Q.40 Unattempt
Identify the correct statements from the following descriptions of various properties of electromagnetic waves.
(A) In a plane electromagnetic wave electric field and magnetic field must be perpendicular to each other and direction of propagation of wave should be along electric field or magnetic field.
(B) The energy in electromagnetic wave is divided equally between electric and magnetic fields.
(C) Both electric field and magnetic field are parallel to each other and perpendicular to the direction of propagation of wave.
(D) The electric field, magnetic field and direction of propagation of wave must be perpendicular to each other.
(E) The ratio of amplitude of magnetic field to the amplitude of electric field is equal to speed of light.
Choose the most appropriate answer from the options given below :
[27-Jul-2022-Shift-2]
Identify the correct statements from the following descriptions of various properties of electromagnetic waves.
(A) In a plane electromagnetic wave electric field and magnetic field must be perpendicular to each other and direction of propagation of wave should be along electric field or magnetic field.
(B) The energy in electromagnetic wave is divided equally between electric and magnetic fields.
(C) Both electric field and magnetic field are parallel to each other and perpendicular to the direction of propagation of wave.
(D) The electric field, magnetic field and direction of propagation of wave must be perpendicular to each other.
(E) The ratio of amplitude of magnetic field to the amplitude of electric field is equal to speed of light.
Choose the most appropriate answer from the options given below :
[27-Jul-2022-Shift-2]
Q.41 Correct
Q.41 In-correct
Q.41 Unattempt
Match List - I with List - II :

Choose the correct answer from the options given below :
[29-Jul-2022-Shift-1]
Match List - I with List - II :

Choose the correct answer from the options given below :
[29-Jul-2022-Shift-1]
Q.42 Correct
Q.42 In-correct
Q.42 Unattempt
A radiation is emitted by 1000W bulb and it generates an electric field and magnetic field at P, placed at a distance of 2m. The efficiency of the bulb is 1.25%. The value of peak electric field at P is x×10−1 V∕m. Value of x is .......... (Rounded-off to the nearest integer) [Take, ε0=8.85×10−12C2N−1m−2, c=3×108ms−1]
[26 Feb 2021 Shift 1]
A radiation is emitted by 1000W bulb and it generates an electric field and magnetic field at P, placed at a distance of 2m. The efficiency of the bulb is 1.25%. The value of peak electric field at P is x×10−1 V∕m. Value of x is .......... (Rounded-off to the nearest integer) [Take, ε0=8.85×10−12C2N−1m−2, c=3×108ms−1]
[26 Feb 2021 Shift 1]
Q.43 Correct
Q.43 In-correct
Q.43 Unattempt
The peak electric field produced by the radiation coming from the 8W bulb at a distance of 10m is ‌
x
10
√‌
µ0c
π
‌
V
m
. The efficiency of the bulb is 10% and it is a point source. The value of x is ............ .
[25 Feb 2021 Shift 2]
The peak electric field produced by the radiation coming from the 8W bulb at a distance of 10m is ‌
x
10
√‌
µ0c
π
‌
V
m
. The efficiency of the bulb is 10% and it is a point source. The value of x is ............ .
[25 Feb 2021 Shift 2]
Q.44 Correct
Q.44 In-correct
Q.44 Unattempt
An electromagnetic wave of frequency 3GHz enters a dielectric medium of relative electric permittivity 2.25 from vacuum. The wavelength of this wave in that medium will be .........×10−2cm.
[24 Feb 2021 Shift 2]
An electromagnetic wave of frequency 3GHz enters a dielectric medium of relative electric permittivity 2.25 from vacuum. The wavelength of this wave in that medium will be .........×10−2cm.
[24 Feb 2021 Shift 2]
Q.45 Correct
Q.45 In-correct
Q.45 Unattempt

choose the correct answer from the options given below
[24 Feb 2021 Shift 2]

choose the correct answer from the options given below
[24 Feb 2021 Shift 2]
Q.46 Correct
Q.46 In-correct
Q.46 Unattempt
An electromagnetic wave of frequency 5GHz, is travelling in a medium whose relative electric permittivity and relative magnetic permeability both are 2 . Its velocity in this medium is ×107m∕s.
[24feb2021shift1]
An electromagnetic wave of frequency 5GHz, is travelling in a medium whose relative electric permittivity and relative magnetic permeability both are 2 . Its velocity in this medium is ×107m∕s.
[24feb2021shift1]
Q.47 Correct
Q.47 In-correct
Q.47 Unattempt
A plane electromagnetic wave propagating along y-direction can have the following pair of electric field (E) and magnetic field (B) components.
[18 Mar 2021 Shift 2]
A plane electromagnetic wave propagating along y-direction can have the following pair of electric field (E) and magnetic field (B) components.
[18 Mar 2021 Shift 2]
Q.48 Correct
Q.48 In-correct
Q.48 Unattempt
A plane electromagnetic wave of frequency 100MHz is travelling in vacuum along the x-direction. At a particular point in space and time, B=2.0×10−8
∧
k
T (where,
∧
k
 is unit vector along z-direction). What is E at this point?
[18 Mar 2021 Shift 1]
A plane electromagnetic wave of frequency 100MHz is travelling in vacuum along the x-direction. At a particular point in space and time, B=2.0×10−8
∧
k
T (where,
∧
k
 is unit vector along z-direction). What is E at this point?
[18 Mar 2021 Shift 1]
Q.49 Correct
Q.49 In-correct
Q.49 Unattempt
The electric field intensity produced by the radiation coming from a 100W bulb at a distance of 3m is E. The electric field intensity produced by the radiation coming from 60W at the same distance is √‌
x
5
E, where the value of x is ..............
[17 Mar 2021 Shift 2]
The electric field intensity produced by the radiation coming from a 100W bulb at a distance of 3m is E. The electric field intensity produced by the radiation coming from 60W at the same distance is √‌
x
5
E, where the value of x is ..............
[17 Mar 2021 Shift 2]
Q.50 Correct
Q.50 In-correct
Q.50 Unattempt
Seawater at a frequency f=9×102Hz, has permittivity ε=80ε0 and resistivity r=0.25Ω−m. Imagine a parallel plate capacitor is immersed in seawater and is driven by an alternating voltage source V(t)=V0‌sin(2πft). Then, the conduction current density becomes 10x times the displacement current density after time t=‌
1
800
s. The value of x is ..............
(‌ Take ‌,‌
1
4πε0
=9×109N−m2C−2)
[17 Mar 2021 Shift 2]
Seawater at a frequency f=9×102Hz, has permittivity ε=80ε0 and resistivity r=0.25Ω−m. Imagine a parallel plate capacitor is immersed in seawater and is driven by an alternating voltage source V(t)=V0‌sin(2πft). Then, the conduction current density becomes 10x times the displacement current density after time t=‌
1
800
s. The value of x is ..............
(‌ Take ‌,‌
1
4πε0
=9×109N−m2C−2)
[17 Mar 2021 Shift 2]
Q.51 Correct
Q.51 In-correct
Q.51 Unattempt
A plane electromagnetic wave of frequency 500MHz is travelling in vacuum along y-direction. At a particular point in space and time, B=8.0×10−8
∧
z
T. The value of electric field at this point is (speed of light =3×108ms−1;
∧
x
,
∧
y
,
∧
z
 are unit vectors along x,y and z-direction).
[16 Mar 2021 Shift 1]
A plane electromagnetic wave of frequency 500MHz is travelling in vacuum along y-direction. At a particular point in space and time, B=8.0×10−8
∧
z
T. The value of electric field at this point is (speed of light =3×108ms−1;
∧
x
,
∧
y
,
∧
z
 are unit vectors along x,y and z-direction).
[16 Mar 2021 Shift 1]
Q.52 Correct
Q.52 In-correct
Q.52 Unattempt
For an electromagnetic wave travelling in free space, the relation between average energy densities due to electric (Ue) and magnetic (Um) fields is
[16 Mar 2021 Shift 1]
For an electromagnetic wave travelling in free space, the relation between average energy densities due to electric (Ue) and magnetic (Um) fields is
[16 Mar 2021 Shift 1]
Q.53 Correct
Q.53 In-correct
Q.53 Unattempt
The relative permittivity of distilled water is 81 . The velocity of light in it will be :
( Given µr=1)
[27 Jul 2021 Shift 1]
The relative permittivity of distilled water is 81 . The velocity of light in it will be :
( Given µr=1)
[27 Jul 2021 Shift 1]
Q.54 Correct
Q.54 In-correct
Q.54 Unattempt
Intensity of sunlight is observed as 0.092Wm−2 at a point in free space. What will be the peak value of magnetic field at that point? (ε0=8.85×10−12C2N−1m−2)
[22 Jul 2021 Shift 2]
Intensity of sunlight is observed as 0.092Wm−2 at a point in free space. What will be the peak value of magnetic field at that point? (ε0=8.85×10−12C2N−1m−2)
[22 Jul 2021 Shift 2]
Q.55 Correct
Q.55 In-correct
Q.55 Unattempt
In an electromagnetic wave the electric field vector and magnetic field vector are given as
→
E
=E0
^
i
and
→
B
=B0
^
k
 respectively. The direction of propagation of electromagnetic wave is along:
[20 Jul 2021 Shift 2]
In an electromagnetic wave the electric field vector and magnetic field vector are given as
→
E
=E0
^
i
and
→
B
=B0
^
k
 respectively. The direction of propagation of electromagnetic wave is along:
[20 Jul 2021 Shift 2]
Q.56 Correct
Q.56 In-correct
Q.56 Unattempt
A light beam is described by
E=800‌sin(ωt−
x
c
). An electron is allowed to move normal to the propagation of light beam with a speed 3×107ms−1. What is the maximum magnetic force exerted on the electron?
[26 Aug 2021 Shift 2]
A light beam is described by
E=800‌sin(ωt−
x
c
). An electron is allowed to move normal to the propagation of light beam with a speed 3×107ms−1. What is the maximum magnetic force exerted on the electron?
[26 Aug 2021 Shift 2]
Q.57 Correct
Q.57 In-correct
Q.57 Unattempt
The magnetic field vector of an electromagnetic wave is given by B=B0
^
i
+
^
j
√2
‌cos(kz−ωt)‌T where
^
i
,
^
j
 represents unit vector along X and Y-axis respectively. At t=0, two electric charges q1of 4πC and q2 of 2π C located at (0,0,
π
k
) and (0,0,
3π
k
) respectively, have the same velocity of 0.5c
^
i
.
(where, c is the velocity of light). The ratio of the force acting on charge q1 to q2 is
[31 Aug 2021 Shift 2]
The magnetic field vector of an electromagnetic wave is given by B=B0
^
i
+
^
j
√2
‌cos(kz−ωt)‌T where
^
i
,
^
j
 represents unit vector along X and Y-axis respectively. At t=0, two electric charges q1of 4πC and q2 of 2π C located at (0,0,
π
k
) and (0,0,
3π
k
) respectively, have the same velocity of 0.5c
^
i
.
(where, c is the velocity of light). The ratio of the force acting on charge q1 to q2 is
[31 Aug 2021 Shift 2]
Q.58 Correct
Q.58 In-correct
Q.58 Unattempt
The electric field in an electromagnetic wave is given by E=(50NC−1)‌sin‌ω(t−
x
c
).The energy contained in a cylinder of volume V is 5.5×10−12J. The value of V is .......... cm3.
(Given ε0=8.85×10−12C2N−1m−2 ).
[31 Aug 2021 Shift 1]
The electric field in an electromagnetic wave is given by E=(50NC−1)‌sin‌ω(t−
x
c
).The energy contained in a cylinder of volume V is 5.5×10−12J. The value of V is .......... cm3.
(Given ε0=8.85×10−12C2N−1m−2 ).
[31 Aug 2021 Shift 1]
Q.59 Correct
Q.59 In-correct
Q.59 Unattempt
A plane electromagnetic wave with frequency of 30‌MHz travels in free space. At particular point in space and time, electric field is 6V∕m. The magnetic field at this point will be x×10−8T. The value of x is.
[27 Aug 2021 Shift 2]
A plane electromagnetic wave with frequency of 30‌MHz travels in free space. At particular point in space and time, electric field is 6V∕m. The magnetic field at this point will be x×10−8T. The value of x is.
[27 Aug 2021 Shift 2]
Q.60 Correct
Q.60 In-correct
Q.60 Unattempt
Electric field in a plane electromagnetic wave is given by E=50‌sin(500x−10×1010t)‌V∕m.
The velocity of electromagnetic wave in this medium is
(Given, c = speed of light in vacuum)
[27 Aug 2021 Shift 1]
Electric field in a plane electromagnetic wave is given by E=50‌sin(500x−10×1010t)‌V∕m.
The velocity of electromagnetic wave in this medium is
(Given, c = speed of light in vacuum)
[27 Aug 2021 Shift 1]
Q.61 Correct
Q.61 In-correct
Q.61 Unattempt
The electric field in a plane electromagnetic wave is given by
E = 200cos
[(
0.5×103
m
)x−(1.5×1011‌
rad
s
×t)]
v
m
^
j
If this wave falls normally on a perfectly reflecting surface having an area of 100cm2. If the radiation pressure exerted by the EM wave on the surface during a 10 min exposure is
x
109
. Find the value of x.
[26 Aug 2021 Shift 1]
The electric field in a plane electromagnetic wave is given by
E = 200cos
[(
0.5×103
m
)x−(1.5×1011‌
rad
s
×t)]
v
m
^
j
If this wave falls normally on a perfectly reflecting surface having an area of 100cm2. If the radiation pressure exerted by the EM wave on the surface during a 10 min exposure is
x
109
. Find the value of x.
[26 Aug 2021 Shift 1]
Q.62 Correct
Q.62 In-correct
Q.62 Unattempt
Electric field of plane electromagnetic wave propagating through a non-magnetic medium is given by E=20‌cos(2×1010t−200x)‌V∕m. The dielectric constant of the medium is equal to (Take, μr=1 )
[1 Sep 2021 Shift 2]
Electric field of plane electromagnetic wave propagating through a non-magnetic medium is given by E=20‌cos(2×1010t−200x)‌V∕m. The dielectric constant of the medium is equal to (Take, μr=1 )
[1 Sep 2021 Shift 2]
Q.63 Correct
Q.63 In-correct
Q.63 Unattempt
The electric fields of two plane electromagnetic plane waves in vacuum are given by
→
E
1=E0
^
j
‌cos(ωt−kx) and
→
E
2=E0
^
k
‌cos(ωt−ky).
At t=0, a particle of charge q is at origin with a velocity
→
v
=0.8c
^
j
(c is the speed of light in vacuum). The instantaneous force experienced by the particle is:
[9 Jan 2020, I]
The electric fields of two plane electromagnetic plane waves in vacuum are given by
→
E
1=E0
^
j
‌cos(ωt−kx) and
→
E
2=E0
^
k
‌cos(ωt−ky).
At t=0, a particle of charge q is at origin with a velocity
→
v
=0.8c
^
j
(c is the speed of light in vacuum). The instantaneous force experienced by the particle is:
[9 Jan 2020, I]
Q.64 Correct
Q.64 In-correct
Q.64 Unattempt
A plane electromagnetic wave is propagating along the direction
^
i
+
^
j
√2
, with its polarization along the direction
^
k
. The correct form of the magnetic field of the wave would be (here B0 is an appropriate constant):
[9 Jan 2020, II]
A plane electromagnetic wave is propagating along the direction
^
i
+
^
j
√2
, with its polarization along the direction
^
k
. The correct form of the magnetic field of the wave would be (here B0 is an appropriate constant):
[9 Jan 2020, II]
Q.65 Correct
Q.65 In-correct
Q.65 Unattempt
A plane electromagnetic wave of frequency 25GHz is propagating in vacuum along the z -direction. At a particular point in space and time, the magnetic field is given by
→
B
=5×10−8
^
j
T. The corresponding electric field
^
E
 is (speed of light c=3×108ms−1)
[8 Jan 2020, II]
A plane electromagnetic wave of frequency 25GHz is propagating in vacuum along the z -direction. At a particular point in space and time, the magnetic field is given by
→
B
=5×10−8
^
j
T. The corresponding electric field
^
E
 is (speed of light c=3×108ms−1)
[8 Jan 2020, II]
Q.66 Correct
Q.66 In-correct
Q.66 Unattempt
If the magnetic field in a plane electromagnetic wave is given by
→
B
=3×10−8‌sin(1.6×103x +48 ×1010t)‌
^
j
‌T, then what will be expression for electric field?
[7 Jan 2020, I]
If the magnetic field in a plane electromagnetic wave is given by
→
B
=3×10−8‌sin(1.6×103x +48 ×1010t)‌
^
j
‌T, then what will be expression for electric field?
[7 Jan 2020, I]
Q.67 Correct
Q.67 In-correct
Q.67 Unattempt
The electric field of a plane electromagnetic wave is given by
→
E
=E0
^
i
+
^
j
√2
‌cos(kz+ωt)
At t=0, a positively charged particle is at the point (x,y,z)=(0,0,
π
k
). If its instantaneous velocity at (t=0) is v0
^
k
, the force acting on it due to the wave is:
[7 Jan 2020, II]
The electric field of a plane electromagnetic wave is given by
→
E
=E0
^
i
+
^
j
√2
‌cos(kz+ωt)
At t=0, a positively charged particle is at the point (x,y,z)=(0,0,
π
k
). If its instantaneous velocity at (t=0) is v0
^
k
, the force acting on it due to the wave is:
[7 Jan 2020, II]
Q.68 Correct
Q.68 In-correct
Q.68 Unattempt
For a plane electromagnetic wave, the magnetic field at a point x and time t is
→
B
(x,t)=[1.2×10−7‌sin(0.5×103x +1.5×1011t)‌
^
k
]‌T
The instantaneous electric field
→
E
 corresponding to B is: ( speed of light c=3×108ms−1)
[Sep. 06, 2020 (II)]
For a plane electromagnetic wave, the magnetic field at a point x and time t is
→
B
(x,t)=[1.2×10−7‌sin(0.5×103x +1.5×1011t)‌
^
k
]‌T
The instantaneous electric field
→
E
 corresponding to B is: ( speed of light c=3×108ms−1)
[Sep. 06, 2020 (II)]
Q.69 Correct
Q.69 In-correct
Q.69 Unattempt
An electron is constrained to move along the y -axis with a speed of 0.1c(c is the speed of light) in the presence of electromagnetic wave, whose electric field is
→
E
=30
^
j
 sin(1.5×107t−5×10−2x)‌V∕m. The maximum magnetic force experienced by the electron will be :
(given c=3×108ms−1& electron charge =1.6×10−19C)
[Sep. 05,2020 (I)]
An electron is constrained to move along the y -axis with a speed of 0.1c(c is the speed of light) in the presence of electromagnetic wave, whose electric field is
→
E
=30
^
j
 sin(1.5×107t−5×10−2x)‌V∕m. The maximum magnetic force experienced by the electron will be :
(given c=3×108ms−1& electron charge =1.6×10−19C)
[Sep. 05,2020 (I)]
Q.70 Correct
Q.70 In-correct
Q.70 Unattempt
The electric field of a plane electromagnetic wave is given by
→
E
=E0(
^
x
+
^
y
)‌sin(kz−ωt)
Its magnetic field will be given by:
[Sep. 04,2020 (II)]
The electric field of a plane electromagnetic wave is given by
→
E
=E0(
^
x
+
^
y
)‌sin(kz−ωt)
Its magnetic field will be given by:
[Sep. 04,2020 (II)]
Q.71 Correct
Q.71 In-correct
Q.71 Unattempt
The magnetic field of a plane electromagnetic wave is
→
B
=3×10−8‌sin[200π(y+ct)]‌
^
i
‌T
where c=3×108ms−1 is the speed of light. The corresponding electric field is :
[Sep. 03, 2020 (I)]
The magnetic field of a plane electromagnetic wave is
→
B
=3×10−8‌sin[200π(y+ct)]‌
^
i
‌T
where c=3×108ms−1 is the speed of light. The corresponding electric field is :
[Sep. 03, 2020 (I)]
Q.72 Correct
Q.72 In-correct
Q.72 Unattempt
The electric field of a plane electromagnetic wave propagating along the x direction in vacuum is
→
E
=E0
^
j
‌cos(ωt−kx). The magnetic field
→
B
, at the moment t=0 is:
[Sep. 03, 2020 (II)]
The electric field of a plane electromagnetic wave propagating along the x direction in vacuum is
→
E
=E0
^
j
‌cos(ωt−kx). The magnetic field
→
B
, at the moment t=0 is:
[Sep. 03, 2020 (II)]
Q.73 Correct
Q.73 In-correct
Q.73 Unattempt
A plane electromagnetic wave, has frequency of 2.0×1010 Hz and its energy density is 1.02×10−8J∕m3 in vacuum. The amplitude of the magnetic field of the wave is close to (
1
4πε0
=9×109
Nm2
C2
 and speed of light =3×108ms−1)
[Sep. 02, 2020 (I)]
A plane electromagnetic wave, has frequency of 2.0×1010 Hz and its energy density is 1.02×10−8J∕m3 in vacuum. The amplitude of the magnetic field of the wave is close to (
1
4πε0
=9×109
Nm2
C2
 and speed of light =3×108ms−1)
[Sep. 02, 2020 (I)]
Q.74 Correct
Q.74 In-correct
Q.74 Unattempt
In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by
^
k
 and 2
^
i
−2
^
j
 respectively. What is the unit vector along direction of propagation of the wave.
[Sep. 02, 2020 (II)]
In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by
^
k
 and 2
^
i
−2
^
j
 respectively. What is the unit vector along direction of propagation of the wave.
[Sep. 02, 2020 (II)]
Q.75 Correct
Q.75 In-correct
Q.75 Unattempt
TOPIC 2 - Electromagnetic Spectrum
The correct match between the entries in column I and column II are :

[Sep. 05, 2020 (II)]
TOPIC 2 - Electromagnetic Spectrum
The correct match between the entries in column I and column II are :

[Sep. 05, 2020 (II)]
Q.76 Correct
Q.76 In-correct
Q.76 Unattempt
Chosse the correct option relating wavelengths of different parts of electromagnetic wave spectrum :
[Sep. 04, 2020 (I)]
Chosse the correct option relating wavelengths of different parts of electromagnetic wave spectrum :
[Sep. 04, 2020 (I)]
Q.77 Correct
Q.77 In-correct
Q.77 Unattempt
The mean intensity of radiation on the surface of the Sun is about 108W∕m2. The rms value of the corresponding magnetic field is closest to :
[12 Jan 2019, II]
The mean intensity of radiation on the surface of the Sun is about 108W∕m2. The rms value of the corresponding magnetic field is closest to :
[12 Jan 2019, II]
Q.78 Correct
Q.78 In-correct
Q.78 Unattempt
An electromagnetic wave of intensity 50Wm−2 enters in a medium of refractive index 'n' without any loss. The ratio of the magnitudes of electric fields, and the ratio of the magnitudes of magnetic fields of the wave before and after entering into the medium are respectively, given by:
[11 Jan 2019, I]
An electromagnetic wave of intensity 50Wm−2 enters in a medium of refractive index 'n' without any loss. The ratio of the magnitudes of electric fields, and the ratio of the magnitudes of magnetic fields of the wave before and after entering into the medium are respectively, given by:
[11 Jan 2019, I]
Q.79 Correct
Q.79 In-correct
Q.79 Unattempt
A 27mW laser beam has a cross-sectional area of 10mm2 The magnitude of the maximum electric field in this electromagnetic wave is given by :
[Given permittivity of space ∈0=9×10−12 SI units, Speed of light c=3×108m∕s]
[11 Jan 2019, II]
A 27mW laser beam has a cross-sectional area of 10mm2 The magnitude of the maximum electric field in this electromagnetic wave is given by :
[Given permittivity of space ∈0=9×10−12 SI units, Speed of light c=3×108m∕s]
[11 Jan 2019, II]
Q.80 Correct
Q.80 In-correct
Q.80 Unattempt
If the magnetic field of a plane electromagnetic wave is given by (The speed of light
=3×108m∕s)
B=100×10−6‌sin[2π×2 ×1015(t−
x
c
)]
then the maximum electric field associated with it is:
[10 Jan. 2019 I]
If the magnetic field of a plane electromagnetic wave is given by (The speed of light
=3×108m∕s)
B=100×10−6‌sin[2π×2 ×1015(t−
x
c
)]
then the maximum electric field associated with it is:
[10 Jan. 2019 I]
Q.81 Correct
Q.81 In-correct
Q.81 Unattempt
The electric field of a plane polarized electromagnetic wave in free space at time t=0 is given by an expression
→
E
(x,y)=10
^
j
‌cos[(6x+8z)]
The magnetic field
→
B
(x,z,t) is given by: (c is the velocity of light)
[10 Jan 2019, II]
The electric field of a plane polarized electromagnetic wave in free space at time t=0 is given by an expression
→
E
(x,y)=10
^
j
‌cos[(6x+8z)]
The magnetic field
→
B
(x,z,t) is given by: (c is the velocity of light)
[10 Jan 2019, II]
Q.82 Correct
Q.82 In-correct
Q.82 Unattempt
An EM wave from air enters a medium. The electric fields are
→
E
1=E01
^
x
‌cos[2πv(
z
c
−t)] in air and
→
E
2=E02
^
x
‌cos[k(2z−ct)] in medium, where the wave number k and frequency v refer to their values in air. The medium is nonmagnetic. If ∈r1 and ∈r2 refer to relative permittivities of air and medium respectively, which of the following options is correct?
[9 Jan 2019, I]
An EM wave from air enters a medium. The electric fields are
→
E
1=E01
^
x
‌cos[2πv(
z
c
−t)] in air and
→
E
2=E02
^
x
‌cos[k(2z−ct)] in medium, where the wave number k and frequency v refer to their values in air. The medium is nonmagnetic. If ∈r1 and ∈r2 refer to relative permittivities of air and medium respectively, which of the following options is correct?
[9 Jan 2019, I]
Q.83 Correct
Q.83 In-correct
Q.83 Unattempt
The energy associated with electric field is (UE) and with magnetic fields is (UB) for an electromagnetic wave in free space. Then :
[9 Jan 2019, II]
The energy associated with electric field is (UE) and with magnetic fields is (UB) for an electromagnetic wave in free space. Then :
[9 Jan 2019, II]
Q.84 Correct
Q.84 In-correct
Q.84 Unattempt
Given below in the left column are different modes of communication using the kinds of waves given in the right column.

From the options given below, find the most appropriate match between entries in the left and the right column.
[10 April 2019, I]
Given below in the left column are different modes of communication using the kinds of waves given in the right column.

From the options given below, find the most appropriate match between entries in the left and the right column.
[10 April 2019, I]
Q.85 Correct
Q.85 In-correct
Q.85 Unattempt
An electromagnetic wave is represented by the electric field
→
E
=E0
^
n
‌sin[ωt+(6y−8z)]. Taking unit vectors inx,y and z directions to be
^
i
,
^
j
,
^
k
, the direction of propogation
^
s
 is :
[12 April 2019, I]
An electromagnetic wave is represented by the electric field
→
E
=E0
^
n
‌sin[ωt+(6y−8z)]. Taking unit vectors inx,y and z directions to be
^
i
,
^
j
,
^
k
, the direction of propogation
^
s
 is :
[12 April 2019, I]
Q.86 Correct
Q.86 In-correct
Q.86 Unattempt
A plane electromagnetic wave having a frequency v=23.9 GHz propagates along the positive z -direction in free space. The peak value of the Electric Field is 60V∕m. Which among the following is the acceptable magnetic field component in the electromagnetic wave?
[12 April 2019, II]
A plane electromagnetic wave having a frequency v=23.9 GHz propagates along the positive z -direction in free space. The peak value of the Electric Field is 60V∕m. Which among the following is the acceptable magnetic field component in the electromagnetic wave?
[12 April 2019, II]
Q.87 Correct
Q.87 In-correct
Q.87 Unattempt
The electric field of a plane electromagnetic wave is given by
→
E
=E0
^
i
‌cos(kz)‌cos(ωt)
The corresponding magnetic field is then given by :
[10 April 2019, I]
The electric field of a plane electromagnetic wave is given by
→
E
=E0
^
i
‌cos(kz)‌cos(ωt)
The corresponding magnetic field is then given by :
[10 April 2019, I]
Q.88 Correct
Q.88 In-correct
Q.88 Unattempt
Light is incident normally on a completely absorbing surface with an energy flux of 25Wcm−2. If the surface has an area of 25cm2, the momentum transferred to the surface in 40 min time duration will be:
[10 April 2019, II]
Light is incident normally on a completely absorbing surface with an energy flux of 25Wcm−2. If the surface has an area of 25cm2, the momentum transferred to the surface in 40 min time duration will be:
[10 April 2019, II]
Q.89 Correct
Q.89 In-correct
Q.89 Unattempt
The magnetic field of a plane electromagnetic wave is given by:
→
B
=B0
^
i
[cos(kz−ωt)] +B1
^
j
 cos(kz+ωt)
Where B0=3×10−5T and B1=2×10−6T
The rms value of the force experienced by a stationary charge Q=10−4C at z=0 is closest to:
[9 April 2019 I]
The magnetic field of a plane electromagnetic wave is given by:
→
B
=B0
^
i
[cos(kz−ωt)] +B1
^
j
 cos(kz+ωt)
Where B0=3×10−5T and B1=2×10−6T
The rms value of the force experienced by a stationary charge Q=10−4C at z=0 is closest to:
[9 April 2019 I]
Q.90 Correct
Q.90 In-correct
Q.90 Unattempt
A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x - direction. At a particular point in space and time,
→
E
=6.3
^
j
V∕m. The corresponding magnetic field
→
B
, at that point will be:
[9 April 2019 I]
A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x - direction. At a particular point in space and time,
→
E
=6.3
^
j
V∕m. The corresponding magnetic field
→
B
, at that point will be:
[9 April 2019 I]
Q.91 Correct
Q.91 In-correct
Q.91 Unattempt
50W∕m2 energy density of sunlight is normally incident on the surface of a solar panel. Some part of incident energy (25%) is reflected from the surface and the rest is absorbed. The force exerted on 1m2 surface area will be
[9 April 2019, II]
50W∕m2 energy density of sunlight is normally incident on the surface of a solar panel. Some part of incident energy (25%) is reflected from the surface and the rest is absorbed. The force exerted on 1m2 surface area will be
[9 April 2019, II]
Q.92 Correct
Q.92 In-correct
Q.92 Unattempt
A plane electromagnetic wave travels in free space along the x -direction. The electric field component of the wave at a particular point of space and time is E=6Vm−1 along y -direction. Its corresponding magnetic field component, B would be:
[8 April 2019 I]
A plane electromagnetic wave travels in free space along the x -direction. The electric field component of the wave at a particular point of space and time is E=6Vm−1 along y -direction. Its corresponding magnetic field component, B would be:
[8 April 2019 I]
Q.93 Correct
Q.93 In-correct
Q.93 Unattempt
The magnetic field of an electromagnetic wave is given by:
→
B
=1.6×10−6‌cos(2×107z+6×1015t) (2
^
i
+
^
j
)
Wb
m2
The associated electric field will be :
[8 April 2019 II]
The magnetic field of an electromagnetic wave is given by:
→
B
=1.6×10−6‌cos(2×107z+6×1015t) (2
^
i
+
^
j
)
Wb
m2
The associated electric field will be :
[8 April 2019 II]
Q.94 Correct
Q.94 In-correct
Q.94 Unattempt
A plane electromagnetic wave of wavelength l has an intensity I. It is propagating along the positive Y– direction. The allowed expressions for the electric and magnetic fields are given by
[Online April 16, 2018]
A plane electromagnetic wave of wavelength l has an intensity I. It is propagating along the positive Y– direction. The allowed expressions for the electric and magnetic fields are given by
[Online April 16, 2018]
Q.95 Correct
Q.95 In-correct
Q.95 Unattempt
A monochromatic beam of light has a frequencyv=
3
2π
×1012Hz and is propagating along the direction
^
i
+
^
j
√2
. It is polarized along the
^
k
 direction. The acceptable form for the magnetic field is:
[Online April 15, 2018]
A monochromatic beam of light has a frequencyv=
3
2π
×1012Hz and is propagating along the direction
^
i
+
^
j
√2
. It is polarized along the
^
k
 direction. The acceptable form for the magnetic field is:
[Online April 15, 2018]
Q.96 Correct
Q.96 In-correct
Q.96 Unattempt
The electric field component of a monochromatic radiation is given by
→
E
=2E0
^
i
‌cos‌kz‌cos‌ω‌tIts magnetic field
→
B
 is then given by :
[Online April 9, 2017 ]
The electric field component of a monochromatic radiation is given by
→
E
=2E0
^
i
‌cos‌kz‌cos‌ω‌tIts magnetic field
→
B
 is then given by :
[Online April 9, 2017 ]
Q.97 Correct
Q.97 In-correct
Q.97 Unattempt
Magnetic field in a plane electromagnetic wave is given by
→
B
=B0‌sin(kx+ωt)‌
^
j
‌T Expression for corresponding electric field will be : Where c is speed of light.
[Online April 8,2017]
Magnetic field in a plane electromagnetic wave is given by
→
B
=B0‌sin(kx+ωt)‌
^
j
‌T Expression for corresponding electric field will be : Where c is speed of light.
[Online April 8,2017]
Q.98 Correct
Q.98 In-correct
Q.98 Unattempt
Consider an electromagnetic wave propagating in vacuum. Choose the correct statement:
[Online April 10, 2016]
Consider an electromagnetic wave propagating in vacuum. Choose the correct statement:
[Online April 10, 2016]
Q.99 Correct
Q.99 In-correct
Q.99 Unattempt
Arrange the following electromagnetic radiations per quantum in the order of increasing energy :
A : Blue light
B : Yellow light
C : X-ray
D : Radio wave.
[2016]
Arrange the following electromagnetic radiations per quantum in the order of increasing energy :
A : Blue light
B : Yellow light
C : X-ray
D : Radio wave.
[2016]
Q.100 Correct
Q.100 In-correct
Q.100 Unattempt
Microwave oven acts on the principle of :
[Online April 9, 2016]
Microwave oven acts on the principle of :
[Online April 9, 2016]
Q.101 Correct
Q.101 In-correct
Q.101 Unattempt
For plane electromagnetic waves propagating in the z-direction, which one of the following combination gives the correct possible direction for
→
E
 and
→
B
 field respectively?
[Online April 11, 2015]
For plane electromagnetic waves propagating in the z-direction, which one of the following combination gives the correct possible direction for
→
E
 and
→
B
 field respectively?
[Online April 11, 2015]
Q.102 Correct
Q.102 In-correct
Q.102 Unattempt
An electromagnetic wave travelling in the x -direction has frequency of 2×1014Hz and electric field amplitude of 27 Vm−1. From the options given below, which one describes the magnetic field for this wave ?
[Online April 10,2015]
An electromagnetic wave travelling in the x -direction has frequency of 2×1014Hz and electric field amplitude of 27 Vm−1. From the options given below, which one describes the magnetic field for this wave ?
[Online April 10,2015]
Q.103 Correct
Q.103 In-correct
Q.103 Unattempt
During the propagation of electromagnetic waves in a medium:
[2014]
During the propagation of electromagnetic waves in a medium:
[2014]
Q.104 Correct
Q.104 In-correct
Q.104 Unattempt
A lamp emits monochromatic green light uniformly in all directions. The lamp is 3% efficient in converting electrical power to electromagnetic waves and consumes 100 W of power. The amplitude of the electric field associated with the electromagnetic radiation at a distance of 5 m from the lamp will be nearly:
[Online April 12, 2014]
A lamp emits monochromatic green light uniformly in all directions. The lamp is 3% efficient in converting electrical power to electromagnetic waves and consumes 100 W of power. The amplitude of the electric field associated with the electromagnetic radiation at a distance of 5 m from the lamp will be nearly:
[Online April 12, 2014]
Q.105 Correct
Q.105 In-correct
Q.105 Unattempt
An electromagnetic wave of frequency 1×1014 hertz is propagating along z-axis. The amplitude of electric field is 4V∕m. If ε0=8.8×10−12C2∕N−m2, then average energy density of electric field will be:
[Online April 11,2014]
An electromagnetic wave of frequency 1×1014 hertz is propagating along z-axis. The amplitude of electric field is 4V∕m. If ε0=8.8×10−12C2∕N−m2, then average energy density of electric field will be:
[Online April 11,2014]
Q.106 Correct
Q.106 In-correct
Q.106 Unattempt
Match List - I (Electromagnetic wave type) with List - II (Its association/application) and select the correct option from the choices given below the lists:

[2014]
Match List - I (Electromagnetic wave type) with List - II (Its association/application) and select the correct option from the choices given below the lists:

[2014]
Q.107 Correct
Q.107 In-correct
Q.107 Unattempt
If microwaves, X rays, infrared, gamma rays, ultra-violet,radio waves and visible parts of the electromagnetic spectrum are denoted by M, X, I, G, U, R and V then which of the following is the arrangement in ascending order of wavelength ?
[Online April 19, 2014]
If microwaves, X rays, infrared, gamma rays, ultra-violet,radio waves and visible parts of the electromagnetic spectrum are denoted by M, X, I, G, U, R and V then which of the following is the arrangement in ascending order of wavelength ?
[Online April 19, 2014]
Q.108 Correct
Q.108 In-correct
Q.108 Unattempt
Match the List-I (Phenomenon associated with electromagnetic radiation) with List-II (Part of electromagnetic spectrum) and select the correct code from the choices given below this lists:

[Online April 11, 2014]
Match the List-I (Phenomenon associated with electromagnetic radiation) with List-II (Part of electromagnetic spectrum) and select the correct code from the choices given below this lists:

[Online April 11, 2014]
Q.109 Correct
Q.109 In-correct
Q.109 Unattempt
Match List I (Wavelength range of electromagnetic spectrum) with List II (Method of production of these waves) and select the correct option from the options given below the lists.

[Online April 9, 2014]
Match List I (Wavelength range of electromagnetic spectrum) with List II (Method of production of these waves) and select the correct option from the options given below the lists.

[Online April 9, 2014]
Q.110 Correct
Q.110 In-correct
Q.110 Unattempt
The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is :
[2013]
The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is :
[2013]
Q.111 Correct
Q.111 In-correct
Q.111 Unattempt
A plane electromagnetic wave in a non-magnetic dielectric medium is given by
→
E
=
→
E
0(4×10−7x−50t) with distance being in meter and time in seconds. The dielectric constant of the medium is :
[Online April 22, 2013]
A plane electromagnetic wave in a non-magnetic dielectric medium is given by
→
E
=
→
E
0(4×10−7x−50t) with distance being in meter and time in seconds. The dielectric constant of the medium is :
[Online April 22, 2013]
Q.112 Correct
Q.112 In-correct
Q.112 Unattempt
Select the correct statement from the following :
[Online April 9, 2013]
Select the correct statement from the following :
[Online April 9, 2013]
Q.113 Correct
Q.113 In-correct
Q.113 Unattempt
Photons of an electromagnetic radiation has an energy 11 keV each. To which region of electromagnetic spectrum does it belong ?
[Online April 9, 2013]
Photons of an electromagnetic radiation has an energy 11 keV each. To which region of electromagnetic spectrum does it belong ?
[Online April 9, 2013]
Q.114 Correct
Q.114 In-correct
Q.114 Unattempt
An electromagnetic wave in vacuum has the electric and magnetic field
→
E
 and
→
B
, which are always perpendicular to each other. The direction of polarization is given by vec‌X and that of wave propagation by
→
k
. Then
[2012]
An electromagnetic wave in vacuum has the electric and magnetic field
→
E
 and
→
B
, which are always perpendicular to each other. The direction of polarization is given by vec‌X and that of wave propagation by
→
k
. Then
[2012]
Q.115 Correct
Q.115 In-correct
Q.115 Unattempt
An electromagnetic wave with frequency ω and wavelength λ travels in the + y direction. Its magnetic field is along + x-axis. The vector equation for the associated electric field (of amplitude E0 ) is
[Online May 19, 2012]
An electromagnetic wave with frequency ω and wavelength λ travels in the + y direction. Its magnetic field is along + x-axis. The vector equation for the associated electric field (of amplitude E0 ) is
[Online May 19, 2012]
Q.116 Correct
Q.116 In-correct
Q.116 Unattempt
The frequency of X-rays; γ-rays and ultraviolet rays are respectively a, b and c then
[Online May 26, 2012]
The frequency of X-rays; γ-rays and ultraviolet rays are respectively a, b and c then
[Online May 26, 2012]
Q.117 Correct
Q.117 In-correct
Q.117 Unattempt
An electromagnetic wave of frequency v=3.0 MHz passes from vacuum into a dielectric medium with permittivity ∈=4.0 . Then
[2004]
An electromagnetic wave of frequency v=3.0 MHz passes from vacuum into a dielectric medium with permittivity ∈=4.0 . Then
[2004]
Q.118 Correct
Q.118 In-correct
Q.118 Unattempt
Electromagnetic waves are transverse in nature is evident by
[2002]
Electromagnetic waves are transverse in nature is evident by
[2002]
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