Question

What is an electromagnet? Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet.

Answer 1

An electromagnet is a rod of magnetic material (say soft iron) placed inside a solenoid coil. On passing current in the solenoid coil, the iron rod begins to behave as a magnet. The strength of magnetization can be increased by increasing the amount of current flow or by increasing the number of turns in the coil.