Question

The conducting loop in the form of a circle is placed in a uniform magnetic field with its plane perpendicular to the direction of the field. An emf will be induced in the loop if :

• A. it is translated parallel to itself
• B. it is rotated about one of its diameters
• C. it is rotated about its own axis which is parallel to the field
• D. the loop is deformed from the original shape

Answer 1

Answer: (B), (D)

The correct options are
B it is rotated about one of its diameters
D the loop is deformed from the original shape

EMF is induced if the flux, $\Phi =\overrightarrow{B}.\overrightarrow{A}$, is changed with respect to time. This can happen if the area vector is changed(rotation about one of the diameters) or magnitude of the area vector is changed (deforming the loop).