Question

A 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 translated
• B. it is rotated about its axis
• C. it is rotated about a diameter
• D. it is deformed

Answer 1

Answer: (C), (D)

The correct options are
C it is rotated about a diameter
D it is deformed

$\varphi =\overrightarrow{B}.\overrightarrow{A}=BAcos\theta$

where $\varphi$=magnetic flux, $B$=magnetic field and $\overrightarrow{A}$=area vector

The e.m.f. is induced only when the flux linked with the coil changes.

Since, field is constant , flux can be changed either by changing $A$ or $\theta$.

Hence, answer are option-(C) and (D).