how an electromagnet is made?

An electromagnet needs a soft iron core. A nail will work. Wrap a coil of wire around the wire. Connect a battery to either end of the wire and you have an electromagnet. The more coils the stronger magnet. The larger battery the stronger magnet.

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Wrapping a solenoid over a soft iron core and passing current through the solenoid creates a electromagnet 0
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now thats a simple question,y cant u ask ur respective teacher
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