Computers and Technology

Ryan Levy

23 October, 07:12

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.