Question

State four uses of electromagnets.

Answer 1

Below are the uses of electromagnets.

• The discovery of the electromagnet made possible the invention of electric motors and generators. Both of these work on a scientific principle called electromagnetic induction. This phenomenon was discovered by the scientist Michael Faraday.
• Electromagnets are used to control the switches in relay. This is important especially when it comes to things like making a telephone call.
• Only materials made of iron, nickel, cobalt or their alloys or naturally occurring minerals respond to a magnetic field. This has many practical uses. One use is sorting out metals. Since the elements mentioned are used a lot in manufacturing, using an electromagnet is an efficient way to sort these metals out.
• Used in lifting of massive objects.
• They are also used in transportation. Trains in Asia and Europe use electromagnets to levitate the cars. This helps them to move at phenomenal speeds.