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Physics Test 130
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  • Question 1/10
    4 / -1

    In an ideal parallel L-C circuit, the capacitor is charged by connecting it to a DC source which is then disconnected. The current in the circuit

  • Question 2/10
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    The rms value of AC voltage is  v 3+4 sin (100 πt )

  • Question 3/10
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    Two coils C1 & C2 are placed adjacent to each other, if current is changed in coil C1 at a rate of 5A/sec, the emf induced in coil C2 is 20mV. What emf will be induced in 7C1 if the current is changed in Coil C2 at a rate of 7 A/Sec (Assume there is no change in orientation or position of the coils) 

  • Question 4/10
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    A magnetic needle is kept in a non uniform magnetic field. It experiences 

  • Question 5/10
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    A Cu ring is suspended by a thread in a vertical plane. The north pole of a magnet is brought near the ring in horizontal direction as shown in figure. What will be effect on the ring ? 

  • Question 6/10
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    An emf  E = 4 Cos 1000 t volt is applied to an L-R circuit of inductance 3 mH and resistance 4 Ω. The amplitude of the current in the circuit is

  • Question 7/10
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    Directions For Questions

    Direction : Read the following question and choose

    A. If both Assertion and Reason are correct and reason is the correct explanation of assertion

    B. If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion

    C. If Assertion is true, but the Reason is false

    D. If Assertion is false, but the Reason is true

    E. If both assertion and reason are false

    ...view full instructions

    Assertion : A.C. is more dangerous than D.C.

    Reason: The peak value of A.C. is 41.4% higher than the D.C

  • Question 8/10
    4 / -1

    Directions For Questions

    Direction : Read the following question and choose

    A. If both Assertion and Reason are correct and reason is the correct explanation of assertion

    B. If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion

    C. If Assertion is true, but the Reason is false

    D. If Assertion is false, but the Reason is true

    E. If both assertion and reason are false

    ...view full instructions

    Assertion: Self Inductance is also known as inertia of electricity.

    Reason : Self Inductance is the property of Coil due to which the coil opposes the flow current through it

  • Question 9/10
    4 / -1

    Directions For Questions

    Direction : Read the following question and choose

    A. If both Assertion and Reason are correct and reason is the correct explanation of assertion

    B. If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion

    C. If Assertion is true, but the Reason is false

    D. If Assertion is false, but the Reason is true

    E. If both assertion and reason are false

    ...view full instructions

    Assertion: In the phenomenon of mutual induction self induction of each of the coils persists

    Reason: Self induction arises when strength of current in one coil changes. In this case, current may be changing in both the individual coils

  • Question 10/10
    4 / -1

    Directions For Questions

    Direction : Read the following question and choose

    A. If both Assertion and Reason are correct and reason is the correct explanation of assertion

    B. If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion

    C. If Assertion is true, but the Reason is false

    D. If Assertion is false, but the Reason is true

    E. If both assertion and reason are false

    ...view full instructions

    Assertion: When number of turns in a coil is doubled, coefficient of self-inductance of the coil becomes 4 times

    Reason : This is because L ∞ N2

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