Question

A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is

1. pushed into the coil

2. withdrawn from inside the coil

3. held stationary inside the coil?

Answer 1

1. There is a momentary deflection in the needle of the galvanometer.

2. Now the galvanometer is deflected towards the left showing that the current is now set up in the direction opposite to the first.

3. When the coil is kept stationary with respect to the magnet, the deflection of the galvanometer drops to zero.