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  4. 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. Electric field is induced

Q. 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. Electric field is inducedPhysics Question Image

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Solution:

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.