Uses of magnets 2 — lesson. Science State Board, Class 8.

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Some of the uses of magnets in various fields are listed below.

1. Industry:

Magnetic conveyor belts are used in industries to separate magnetic materials from scraps or junks mixed with non-magnetic materials.

Magnetic conveyor belt

Magnets are so strong that it is used to lift heavy loads. In a junkyard, a crane attached to a magnet is used to carry heavy metal loads. It also helps to separate magnetic materials from the junk.

Junkyard crane

2. Computers:

In machines, magnets are used in computer storage devices such as hard discs.

Computer storage device

The magnets help the computers in banks to read the MICR numbers written on a cheque.
Magstripe is a magnetic strip found on the back of a credit or debit card. This magstripe is a thin plastic film made up of tiny iron-based magnetic particles. Each particle that measures about \(20\ millionths\ of\ an\ inch\) in length is a very small bar magnet.

Magstripe

3. Medical field:

Magnetic Resonance Imaging, also known as MRI, is a method used in hospitals to scan a particular internal organ in our body. These MRI machines make use of a powerful electromagnet for scanning.