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 left. The self inductance of the loop is negligible. Upon entering the field, a counterclockwise current flows in the loop. Upon leaving the field, a clockwise current flows in the loop. When entering the field the coil experiences a magnetic force to the left. When leaving the field the coil experiences a magnetic force to the right.

Explanation / Answer

By Using Lenz's law we can know the direction of induced current which states that the direction of induced current is always opposes the rate of change of magnetic flux

Upon entering the field,the flux through the loop increase,then induced current tries to decrease the flux,So upon entering the direction of current is clockwise

so the statement 1 ) is false

Upon leaving the direction of current in loop is counterclockwise ,so statement 2 is false

By Flemings's left hand rule the direction if force is towards left while entering the field
so the statement 3 is True

when leaving the field the diection of force is towards left ,so the statement 4 is false

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