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.


TrueFalse When leaving the field the coil experiences a magnetic force to the right.
TrueFalse When entering the field the coil experiences a magnetic force to the right.
TrueFalse Upon entering the field, a counterclockwise current flows in the loop.
TrueFalse While the loop is entirely in the field, the emf in the loop is zero.

Answer 1

When flux will change through coil than there will be induced current in coil which will oppose change of magnetic flux.

(a) true.

When coil leaving the field coil will experience force right

(b) false.

When entering the field magnetic force will be toward left side

(c) if magnetic field is upword than current will be clockwise and if magnetic field is down word than current will be anticlock wise while entering.

(d) True

Because when loop will entirely in the field than change in the flux will be zero.