Question

Draw a labelled diagram to make a soft iron bar as an electromagnet. Describe in steps to make an electromagnet.

Answer 1

Explanation:

Definition: An electromagnet is a temporary magnet that acts like a magnet when an electric current flows through a copper wire and loses its magnetism when the electric current stops flowing.

Steps to make an electromagnet:

1. Take a soft iron bar and wind a thin insulated copper wire around the bar.
2. The copper wire is covered with a single thread and the two wires are insulated so that they do not fall on each other.
3. We connect the cell or battery and key between the ends of the coil.
4. When the key is turned off, current flows through the coil and the bar becomes a magnet.
5. Opening the key stops the electric current in the coil and the bar loses its magnetism.
6. Thus, the bar behaves like an electromagnet when the current passes through the coil.