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.

1 answer

The second description is the best way to build an electromagnet: "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."
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