Question

Coil copper wire is connected in galvanometer. Explain the observation if a bar magnet is (a) pushed in to the coil with its North Pole entering first .(b) held at rest inside the coil.(c) pulled out of coil

Answer 1

a-if pushed in coil it produces e.m.f(indused current) in coil which produce magnetic field of North Pole. deflection in galvanometer from zero right to left.
b-no e.m.f. produce no deflection in galvanometer.
c-e.m.f. produce of magnetic field of South Pole. deflection in galvanometer is from zero left to right.