which is the best description of how to build an electromagnet?

A. wrap a wire around an iron or steel core at least ten times.

B. Attach a wire to one end of a battery, wrap the wire around an iron or steel core, and attach the other end of the wire to the other end of the battery.

C. connect one end of a battery to an iron or steel core with a wire, then connect the other end of the battery to the core with another wire.

D. Attach one end of a wire to a battery, and attach the other end of the wire to an iron or steel core.

1 answer

B. Attach a wire to one end of a battery, wrap the wire around an iron or steel core, and attach the other end of the wire to the other end of the battery.