Question

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

Options

• two revolutions

• one revolution

• half revolution

• one-fourth revolution

Answer 1

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

Explanation:
If a rectangular coil of copper wire is rotated in a magnetic field, the direction of the magnetic field to the given side of the coil changes after half a revolution and the direction of the induced current also changes simultaneously.