Electromagnetic Field Theory
Conductor is static and the field is varying then emf will be induced. This principle is called

 dynamically induced emf.
 static induced emf.
 none of these
 virtually induced emf.

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Electromagnetic Field Theory
A copper disc is rotated rapidly below a freely suspended magnetic needle. The magnetic needle starts rotating with velocity

 equal to that of disc and in the opposite direction.
 less than that of disc and in the same direction.
 less than that of disc but in opposite direction.
 equal to that of disc and in the same direction.

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