Question

A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each

• A. Two revolutions
• B. One revolution
• C. Half revolution
• D. One-fourth revolution

Answer 1

The correct option is C

Half revolution

Half revolution:

1. Half of any revolution is a straight line whose angle is $180°$.
2. In every half cycle the direction of induced current changes in the coil when a rectangular copper coil is been placed in a magnetic field. Hence, the direction of the current didn't change.

Hence, option (C) is the correct answer.