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 the figure. 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 AD and BC

Answer 1

The correct option is D in both AD and BC

The square loop $ABCD$ is a metallic loop. So it consists of the free electrons. When the loop moves in a magnetic field, the free electrons in the $AD$ and $BC$ rod will experience the Lorentz force and they will move towards the ends creating a potential difference in the rods.

This induced emf leads to the electric field induced in the rods $AD$ and $BC$ of the square loop. But there will be no current flowing in the loop as ned potential difference is zero.