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 permanent magnet moves towards right the deflection of current in the coil is in:

Options

• clockwise direction

• anticlockwise direction

• direction is not certain

• none of these.

Answer 1

Anticlockwise direction

Explanation:

By Lenz’s law, the induced current opposes the motion of the approaching north pole. So, end A of the coil becomes a north pole. From the magnet’s side, the current in the coil appears anticlockwise, so the direction is anticlockwise.