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When ever the flux linked with a coil ch...

When ever the flux linked with a coil changes, then

A

current is always induced

B

an emf and a current are always induced

C

and emf is incduced but a current is never induced

D

an emf is always induced and a current is induced, when the coil is a closed one

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • Whenever the magnet flux linked with a coil changes, then is an induced emf in the circuit. This emf lasts

    A
    For a short time
    B
    For a long time
    C
    For ever
    D
    So long as the change in the flux takes place

  • Assertion: Lenz's law is about violation of energy conservation in electromagnetic induction . Reason: When magnetic flux linked with a coil changes then emf is induced in such a manner that it opposes the cause that has induced it.

    A
    If both assertion and reason are correct and reason is correct explanation of the assertion
    B
    If both assertion and reason are correct but reason is not correct explanation of the assertion
    C
    If assertion is correct but reason is incorrect.
    D
    If assertion is incorrect but reason is correct.

  • Assertion :- Whenever magnetic flux linked with the coil changes with respect to time, then an emf is induced in ti . Reason :- According to law , the direction of induced current in any coil in such a way that it always oposses the cause by which it is produced.

    A
    If the Assertion & Reason are True & the Reason is a correct explanation of the Assertion .
    B
    If both Assertion & Reason are True & the Reason is not a correct explanation of the Assertion.
    C
    If Assertion is True but the Reason is Fasle.
    D
    If both Assertion and Reason are False .

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    Assertion (A): Whenever the magnetic flux linked with a closed coil changes there will be an induced emf as well as an induced current. Reason (R ) : Accroding to Faraday, the induced emf is inversely proportional to the rate of change of magnetic flux linked with a coil.

    The magnetic flux linked with the coil changes from 0.1 Wb to 0.04 Wb in 3 s. the emf induced in the coil is

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    The magnetic flux linked with a coil is phi and the emf induced in it is e .

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