A circular conducting loop is placed in a uniform magnetic field with its plane perpendicular to the field. An emf is induced in the loop if

A. it is displaced in the same plane in magnetic field
B. it is rotated about its axis
C. it is rotated about a diameter
D. it is converted into square loop in the same plane

Choose the correct answer from the options given below:

C and D

The correct answer is Option (2) → C and D

(C) Rotating the loop about a diameter also changes the angle between magnetic field and the plane of the loop, altering the magnetic flux through the loop.

(D) Changing the shape of the coil does change the magnetic flux in the process of conversion. Hence, inducing emf.