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What is difference between permanent magnet and bar magnet

Posted by Mukul Kumar 6 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Sahdev Sharma 6 years, 9 months ago

Permanent Magnet	Electro Magnet
The South – North polarity of a permanent magnet is fixed and they cannot be changed	The South – North polarity of a permanent magnet can be changed by changing the direction of the current in the coil.
Its strength cannot be changed or altered.	Its strength can be changed by changing the current in it or by changing the number of turns in it.

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