Which is the best description of how to build an electromagnet?(1 point)
Attach one end of a wire to a battery, and attach the other end of the wire to an iron or steel core.
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.
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.
Wrap a wire around an iron or steel core at least ten times.