Question

How does inserting an iron rod into the interior of the inductor affect the inductance of the coil?

Options

• The inductance of the coil decreases.

• The inductance of the coil increases.

• The inductance of the coil becomes zero.

• The inductance of the coil is unchanged.

Answer 1

The magnetic field inside the coil magnetises the iron, increasing the magnetic field inside it. Hence, the inductance of the coil increases.