Question

Juanita made an electromagnet by placing an iron bar inside a coil of wire and then running current through the wire. After awhile, she turned off the current. What happened to the bar

The bar remained magnetic, but only at the poles.
The bar continued to be magnetic forever.
The bar's magnetism became weaker over a long time.
The bar immediately lost its magnetism.​

Answer 1

The bar immediately lost its magnetism.

Step-by-step explanation:

Electromagnets require electricity to have the capabilities of magnets. Remove the energy source and you have an iron bar.