Question

State the differences between an electromagnet and a permanent magnet.

Answer 1

Electromagnet

• The magnetic properties are displayed when current is passed through it .

• Removal of magnetic properties is temporary .

• It is usually made of soft materials .

Permanent magnet

• Magnetic properties exist when the material is magnetized .

• Once magnetic properties is lost, it becomes useless .

• It is usually made of hard materials .

Note : Refer the attachment . of images of electromagnet and a permanent magnet .

Answer 2

Answer :

Electromagnet :-

It is made up of soft iron.

The magnetic field strength can be changed.

The magnetic field is very strong.

The polarity of an electromagnet can be reversed.

It can be easily demagnetised.

Permanent magnet :-

It is made up of steel.

The magnetic field strength cannot be changed.

The magnetic field is not that strong.

The polarity of an permanent magnet cannot be reversed.

It cannot be easily demagnetised.