A student wraps copper wire around an iron nail. Then she connects the ends of the wire to a battery, making an electromagnet. She notices that if she wraps more coils of wire around the bolt, then her electromagnet can pick up more paper clips. What conclusion can she draw?

Question

options:

More coils of wire increases the strength of the electromagnet
More coils of wire increases the strength of the electromagnet

More coils of wire increases the mass of the battery
More coils of wire increases the mass of the battery

More coils of wire increases the density of the copper wire
More coils of wire increases the density of the copper wire

More coils of wire increases the length of the nail

Answer 1

The best conclusion the student can draw from her observation is:

More coils of wire increases the strength of the electromagnet.

Wrapping more coils of wire around the iron nail enhances the magnetic field produced by the electromagnet, allowing it to pick up more paper clips. The other options are not relevant to the behavior of the electromagnet in this experiment.