A rectangular coil of copper wires is rotated in a magnetic field

Q. No 4: Choose the correct option.

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

Ans:

(c) 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.