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When the north pole of magnet is withdrawn towards left, the galvanometer shows:

Options

• no deflection

• deflection towards right

• deflection towards left

• none of these

Answer 1

Deflection towards left

Explanation:

When the north pole is withdrawn, the magnetic flux through the coil decreases. The induced current flows in the opposite direction, so the galvanometer deflects towards the left.