If you make an electromagnet using a battery circuit and a steel nail, how can you increase its magnetic strength? A. replace the nail with a copper rod B. wrap more coils of wire around the nail C. use a longer nail D. remove the plastic insulation from the wire coil
The correct answer is (b.) wrap more coils of wire around the nail. If you make an electromagnet using a battery circuit and a steel nail, you can actually increase its magnetic strength by wrapping more coils of wire around the nail.
