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Physics Mock Test - 4
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  • Question 1/50
    5 / -1
    One Kwh is equal to
  • Question 2/50
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    What is the charge on X-rays?
  • Question 3/50
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    Huygens' wave theory allows us to know
  • Question 4/50
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    A proton and an electron enter in the uniform magnetic (B) field with velocity (v) at right angle to the magnetic field then which charge experience maximum force?
  • Question 5/50
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    in Young’s double-slit experiment, using monochromatic light of wavelength λ, the intensity of light at a point on the screen where path difference is λ is K units. The intensity of light at a point where path difference is \(\frac{\lambda }{3}\) is

  • Question 6/50
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    The resistivity of a material is found to decrease with an increase in temperature. The material is
  • Question 7/50
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    When electric current is passed through a metallic conductor, amount of heat produced in the conductor depends on its
  • Question 8/50
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    The current-voltage graph of ohmic devices is of the form:
  • Question 9/50
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    In Karnataka, the normal domestic power supply AC is 220 V, 50 Hz. Here 220 V and 50 Hz refer to
  • Question 10/50
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    Find the current in the resistance of 1Ω.

  • Question 11/50
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    A wire of length 3m is moving with a speed of 50m/s in a direction perpendicular to a magnetic field of 4.5 Wb/m2. The  induced emf in the wire is
  • Question 12/50
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    Diffraction and refraction indicate
  • Question 13/50
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    The magnetic field at the centre of semi-circular wire carrying current i is
  • Question 14/50
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    The power factor of a series LCR circuit at resonance is
  • Question 15/50
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    The electric field intensity at a point due to a point charge depends on the:
  • Question 16/50
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    Which of the following correctly depicts the magnetic field due to a bar magnet?
  • Question 17/50
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    Lenz’s law is a consequence of the law of conservation of
  • Question 18/50
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    Which among the following is not a property of electromagnetic waves ?
  • Question 19/50
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    Eddy currents are produced when
  • Question 20/50
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    If a charge on the body is 1 nC, then how many electrons are present on the body?
  • Question 21/50
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    In the following network potential at ‘O’

  • Question 22/50
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    Which one of the following conclusions could not be derived from Rutherford's α-particle scattering experiment? 
  • Question 23/50
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    In case of total internal reflection, the entire light is ______ back into the ______ medium.  
  • Question 24/50
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    Electric field lines:
  • Question 25/50
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    If the cell of emf E and the internal resistance r is connected to an external circuit of resistance r, then the potential difference across the cell will be:
  • Question 26/50
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    The angular magnification of a microscope can be increased ________.
  • Question 27/50
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    Mutual inductance of two coils can be increased by
  • Question 28/50
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    In ____________ there is a large gap between the conduction band and the valence band.
  • Question 29/50
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    A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It can detect a signal of wavelength:
  • Question 30/50
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    If the value of potential in an AC circuit is 30 V, then the peak value of potential is :
  • Question 31/50
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    In the given figure, the resultant force on the charge -3μC is:

  • Question 32/50
    5 / -1
    In a double-slit experiment, green light (5303 Å) falls on a double slit having a separation of 19.44 µ-m and a width 4.05 µ-m. The number of bright fringes between the first and the second diffraction minima is
  • Question 33/50
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    Which of the following statements correctly states Gauss theorem?
  • Question 34/50
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    Which of the following waves is used for detecting forgery in currency notes?
  • Question 35/50
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    A circular current carrying loop is placed in a uniform magnetic field B which is perpendicular to the plane of the circular loop. Find the force on the circular loop of radius R and the current in the loop is I.
  • Question 36/50
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    Find the work done (in joules) in moving a charge of 1.6 coulombs across a potential difference of 0.8 V.
  • Question 37/50
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    The Wi-Fi operates on the ______ frequency.
  • Question 38/50
    5 / -1
    When a Van de Graaff generator is switched on, and then turned off after after some time. Then
  • Question 39/50
    5 / -1
    If the work function is 6 eV, then the maximum wavelength of the incident radiation to remove electrons from that metal will be: (h = 6.624 × 10-34 Js, c = 3 × 108 m/sec)
  • Question 40/50
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    Permanent magnet can be made by:
  • Question 41/50
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    Vector form of Biot-savart's law is
  • Question 42/50
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    What do you mean by doping regarding semiconductors?
  • Question 43/50
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    The minimum distance between an object and its real image formed by a convex lens is 
  • Question 44/50
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    The equivalent capacitance of the following arrangement of capacitors is

  • Question 45/50
    5 / -1
    The angular momentum of the electron orbiting around the nucleus in the nth orbit is equal to: (All the symbols have their usual meaning)
  • Question 46/50
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    The torque acting on a dipole moment p placed in an electric field E is 
  • Question 47/50
    5 / -1
    A magnet of magnetic moment \(50\hat i\;A{m^2}\) is placed along the x-axis in a magnetic field \(\vec B = \left( {0.5\hat i + 3.0\hat j} \right)\) T. The torque acting on the magnet is 
  • Question 48/50
    5 / -1
    If the far point of an eye is at 4 m, then identify the defect of eye and the lens needed to correct this.
  • Question 49/50
    5 / -1
    In a convex mirror the image of an object is 1/n times of original. If the focal distance of the mirror is f, then find the object distance–
  • Question 50/50
    5 / -1
    Two parallel wires 1 m apart carry currents of 1 A and 3 A respectively in opposite directions. The force per unit length acting between these two wires is
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