The wires covering the metal and the current is flowing through the wire generates the magnetic field.
What is an electromagnet?
The electromagnet is a type of magnet in which the wire is wrapped on the solid iron core and the wire is connected to the voltage. Now the current will pass through the wire.
When the current passes through the wire the magnetic field is generated around the wire in the circular form. These magnetic fields attract or repel the other magnet.
So this whole system is called the electromagnet because the magnetic fields are generated due to the flow of the current through the wire.
Thus the wires covering the metal and the current is flowing through the wire generate the magnetic field.
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