which is the best description of how to build an electromagnet

attach one end of a wire to a Battery and attach the other end of the wire to an iron or steel core

attract 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 10 times

1 answer

, attach the ends of the wire to a power source (such as a battery), and turn on the power to create the electromagnetic field.
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