Question

A rectangular coil placed in a region having a uniform magnetic field , perpendicular to the plane of the coil. An e.m.f. will not be induced in the coil if the:

• A. magnetic field increases uniformly.
• B. coil is rotated about an axis perpendicular to the plane of the coil and passing through its centre O, the coil remaining in the same plane.
• C. coil is routed about the axis OX.
• D. magnetic field is suddenly switched off.

Answer 1

The correct option is B coil is rotated about an axis perpendicular to the plane of the coil and passing through its centre O, the coil remaining in the same plane.

An e.m.f will not be induced in the coil if the coil is rotated about an axis perpendicular to the plane of the coiil and passing through its centre, O the coil remaining in the same plane.

Hence, Option $B$ is correct answer.