Question

In the given figure, describe the deflection in the galvanometer

1. when the magnet is kept stationary at its position;
2. when the magnet is moved inside the coil and
3. when the magnet is pulled out of the coil.

Answer 1

1. The galvanometer shows no deflection (the pointer stays at zero) because the magnetic flux linked with the coil does not change.
2. The galvanometer shows a momentary deflection in one direction because a current is induced due to an increase in magnetic flux.
3. The galvanometer shows a momentary deflection in the opposite direction because the current is induced in the reverse direction due to a decrease in magnetic flux.