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Give any 2 advantages of electromagnets over bar magnets.

  • In electromagnet, the magnetism can be turned on and off according to the use or need of the operator.
  • The strength can be varied by varying the current in the coil.

 

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1.  whenever needed we can unmagnetize the electromagnets but not bar magnets

2.electromagnets can be made in emergency as bar magnets are uneasy to carry

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  1. the strength of electromagnet can be varied by adjusting the current in the coil.
  2. they can be of various shapes and sizes depending on their uses. 
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