Question

What is an electromagnet? Give two uses of electromagnets. Name two factors on which the strength of an electromagnet depends.

Answer 1

When an electric current passes through a conductor, the conductor behaves like a magnet. This is called as electromagnet. Electro magnets are extensively used in electric devices such as electric fans, refrigerators, washing machines etc. The strength of an electromagnet mainly depends on,

(i) The number of turns of the wire wounded around the metallic core.
(ii) The amount of electric current passing through it.