Question

In the Middle Ages, people used lodestone, a magnet found in nature, as early compasses for navigation. Today, however, most magnets are human-made. Iron, nickel, and cobalt can be magnetized by placing them next to a very strong magnet, causing them to exert a constant magnetic force. Electromagnets are made by running an electric current through a coil of wire, creating a magnetic field. This magnetic field is temporary, however. As soon as the electric current stops, the electromagnet stops being magnetic.

Without electricity, an electromagnet is unable to ________.

A
attract metal

B
be touched

C
remain coiled

D
be seen

Answer 1

The correct answer is A) attract metal.

Without electricity, an electromagnet cannot create a magnetic field, so it will not have the ability to attract metal.