Question

use of bar magnet and electromagnet​

Answer 1

Explanation:

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Answer 2

Difference Between Permanent Magnet and Electromagnet. Difference between Permanent Magnet and Electromagnet is magnetic field and strength. In Electromagnet, the magnetic field is created by a wire-wound coil but the magnetic field of Permanent (Bar) Magnet cannot be changed.

Electromagnets are very widely used in electric and electromechanical devices, including:

Motors and generators

Transformers

Relays

Electric bells and buzzers

Loudspeakers and headphones

Actuators such as valves

Magnetic recording and data storage equipment: tape recorders, VCRs, hard disks

MRI machines

Scientific equipment such as mass spectrometers

Particle accelerators

Magnetic locks

Magnetic separation equipment, used for separating magnetic from nonmagnetic material, for example separating ferrous metal from other material in scrap.

Industrial lifting magnets

magnetic levitation, used in a maglev train or trains

Induction heating for cooking, manufacturing, and hyperthermia therapy

There are many uses of a bar magnet but to illustrate the wide range of uses, here are a few examples:

Bar magnets are used to highlight the magnetic field to children at school using iron filings.

multicoloured letter fridge magnets with labelled rectangle bar magnets

As fridge magnets

Did you know - A fridge magnet has a magnetic field that is about 20 times stronger than the earth!?

Hand placing a bar magnet into a oil filter

Bar magnets are used within a car's oil filter to help remove any ferromagnetic materials which could damage the engine. By doing this it makes the engine last longer.