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.
• Wrap a wire around an iron or steel core at least ten times.
• 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.
• 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.
1 answer
Wrap a wire around an iron or steel core at least ten times.