Question

A rectangle coil of copper coil is rotated in a magenetic field . The direction of the induced current changes once in each (a) two revolution (b) one fourth revolution

Answer 1

Half revolution is the answer
When a rectangular coil of copper is rotated in a magnetic field, the direction of the induced current in the coil changes in every half rotation.

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Answer 2

four revolution bdhhsgs go s Hf ft sb see