how is electro magnet different from a permanent magnet

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Solution

Electromagnet Permanent magnet

1-It is a temporary magnet.
2-It can produce very strong magnetic force.
3-Its polarity can be changed by changing the direction of current in the coil.
4-Its strength can be changed by changing the number of turns or by changing current. 1-As the name suggests,it is a permanent magnet.
2-It produces a comparatively weak force of attraction.
3-Its polarity is fixed and can't be changed.
4-Its strength can't be changed.

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Similar questions

Consider the following statements :

(i) Soft iron conducts electricity

(ii) Soft iron is magnetic material

(iii) Soft iron is used for magnetic permanent magnets

(iv) Soft iron is used as electro magnet

Difference between permanent magnet and electromagnet

(P)

(T)

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Electromagnet	Permanent magnet
1-It is a temporary magnet. 2-It can produce very strong magnetic force. 3-Its polarity can be changed by changing the direction of current in the coil. 4-Its strength can be changed by changing the number of turns or by changing current.	1-As the name suggests,it is a permanent magnet. 2-It produces a comparatively weak force of attraction. 3-Its polarity is fixed and can't be changed. 4-Its strength can't be changed.