write three differences between bar magnet and electromagnet
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an Electromagnet is made from a coil of wire which acts as a magnet when an electric current passing Tharo YouTube of turn an Electromagnet is overpaid around a score of 4 for a magnetic materials
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The differences between bar magnet and electromagnet are as follows :-
⇒ The bar magnet does not have electric current flow through it.
⇒ Electromagnets are made by passing electric current through it.
⇒ The strength of the magnetic field in bar magnets cannot be changed.
⇒ The strength of the electromagnets can be changed by changing the amount of current in the magnet.
⇒ The direction of the magnetic field cannot be changed.
⇒ The direction of magnetic field can be changed in electromagnets.
⇒ The polarity of bar magnets cannot be changed.
⇒ The polarity of the electromagnets can be changed.
⇒ The bar magnet is generally made of hard iron.
⇒ The electromagnets are generally made of soft iron.
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