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Answer:
1. a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
2.There are three main parts required to build an electromagnet: the iron core, copper wire, and an electricity source. Changes in each of these pieces of the electromagnet will influence the overall strength of the magnet.
3.You can make an electromagnet stronger by doing these things:
wrapping the coil around a piece of iron (such as an iron nail)
adding more turns to the coil.
increasing the current flowing through the coil.
Explanation:
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