Rawhiya

1. An electromagnet is made by winding a wire into a coil and passing electric current through it.

2. The magnetic field is produced only when electricity flows in the coil.

3. The strength of an electromagnet depends on the number of coil turns and the amount of current.

4. Electromagnets are temporary magnets, which means they lose magnetism when the current stops.

5. They are used in devices like electric bells, cranes for lifting scrap iron, motors, and speakers.