Question

A metallic square loop $ ABCD$ is moving in its own plane with velocity $v$ in a uniform magnetic field perpendicular to its plane as shown in Fig. An electric field is induced.

• A. In $AD ,$ but not in $BC$
• B. In $BC$, but not in $AD$
• C. Neither in $AD$ nor in $BC$
• D. In both $A D$ and $B C$

Answer 1

Answer: (D)

The electric field/e.m.f. is induced in sides $AD$ and $BC$, both in the same direction. However, there will be no current in loop as the potential of $A$ is same as that of $B$ and potential of $D$ is same as that of $C$