Question

What is electromagnet​

Answer 1

Answer:

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of wire wound into a coil. A current through the wire creates a magnetic field which is concentrated in the hole, denoting the centre of the coil

Explanation:

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Answer 2

Answer:

when a soft iron rod is introduced in a solenoid it becomes an electromagnet . it's current depends on -

till what time we pass the current

on what magnitude we pass the current

in an electromagnet we can increase or decrease magnetic frequency acc. to our need.