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An e.m.f. is produced in a coil, which i...

An e.m.f. is produced in a coil, which is not connected to an exteranl voltage source. This can be due to

A

the coil being in time varying magnetic field

B

the coil moving in a time varying magnetic field

C

the coil moving in constant magnetic field

D

the coil is stationary in external spatially varying magnetic field, which does not change with time

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
An e.m.f. is produced in a coil without connecting it to an external voltage source only when amount of magnetic flux linked with the coil is changing with time. Choices (a) and (b) are correct. Choice (c ) will be correct when the coil is entering ior leaving the constant magentic field partially.
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PRADEEP-ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT-Exercise
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