Question

mention any two advange of an electromagnet over apermanent magnet

Answer 1

1)electromagnets can be easily de magnetised

2)the polarity of an electromagnet can be easily reversed

3)the strength of an electromagnet can be changed accordingly

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Answer 2

1. the electromagnet can be made so stronger but pernanent magnet cannot be made so strong because electromagnet has copper wire which has low resistance and permanent magnet has nichrome wire which has high resistance..
2. the Electromagnet are used in Bells and permanent magnet cannot be used in bells