Give two advantages of an electromagnet over a permanent magnet

Asked by admin @ 04/08/2021 in Physics viewed by 303 People

State two advantages of an electromagnet over a permanent magnet.

ICSE Class 9 Physics Chapter Magnetism

Answered by admin @ 04/08/2021

1. An electromagnet can produce very strong magnetic force whereas a permanent magnet produces a comparatively weak force of attraction.
2.The strength of an electromagnet can be changed by changing the number of turns in its coil or by changing the current passing through it whereas the strength of permanent magnet cannot be changed.
3.The polarity of an electromagnet can be changed by changing the direction of current in its coil whereas the polarity of a permanent magnet is fixed and cannot be changed.

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Give two advantages of an electromagnet over a permanent magnet

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