A square loop of wire with a small resistance is moved with constant speed from

Question

A square loop of wire with a small resistance is moved with constant speed from a field free region into a region of uniform B field (B is constant in time) and then back into a field free region to the right. The self inductance of the loop is negligible. When entering the field the coil experiences a magnetic force to the right. Upon leaving the field, a clockwise current flows in the loop. When leaving the field the coil experiences a magnetic force to the right. Upon entering the field, a clockwise current flows in the loop.

Explanation / Answer

1. False , current induced will be clockwise in loop while entering and magnetic field will push the loop left.

2.False, according to the lenz's law, nature abhores change of flux. so, while leaving induced current will be anticlockwise so as to nullify the loss of magnetic flux.

3.False, anticlockwise current in loop will pull the loop inside the field. hence force will be towards left.

4.True, explanation in part 1.

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