Question

electromagnets are made up of

Answer 1

they are made with a soft iron core wound with a copper wire

Answer 2

Heya
Here is your answer
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Electromagnets are the temporary magnets made up of soft iron core

Electromagnets are those magnets which gain magnetism only when current is passed from them.

They lose their magnetism when current is put off

The strength of a electromagnet depends on:

1. Nature of core material (most of the time it is soft iron which is considered to be the best for a electromagnet)

2. Amount of current ( if the current is more then the magnets become strong, Soft iron is good conductor of electricity)

3. No. of coils
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Hope this helps! ^_^