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When a current is passed through a coil of wire with a piece of iron inside (an electromagnet,a commutator) is formed?
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When a current is passed through a coil of wire with a piece of iron inside (an electromagnet,a commutator) is formed?

User Fernando JS
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when a current is passed through a coil of wire with a piece of iron inside, the one that will be formed is :
an electromagnet
It happens when a soft metal core made into magnet by passage of electric current

hope this helps
User AtomSmasher
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