Question

Figure alongside shows insulated copper coil connected to centre zero galvanometer. The galvanometer shows deflection to the right when the north pole of a powerful magnet is moved to the right. Answer the following question:

 When the movement of the magnet towards right stopped, then:

Options

• magnitude of induced current is zero

• the galvanometer shows no deflection

• no electromagnetic induction takes place

• all of these

Answer 1

All of these

Explanation:

When the magnet stops moving, the magnetic flux through the coil stops changing. So no induced e.m.f. is produced, no current is induced, and the galvanometer shows no deflection. Hence, all the statements are correct.