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?(1 point)

Question

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?(1 point)

Responses

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

More coils of wire increases the length of the nail
More coils of wire increases the length of the nail

More coils of wire increases the strength of the electromagnet

Answer 1

More coils of wire increases the strength of the electromagnet

Answer 2

More coils of wire increases the strength of the electromagnet.

Answer 3

The conclusion that the student can draw is that more coils of wire increase the strength of the electromagnet. When the student wraps more coils of wire around the iron nail, it increases the number of turns of wire and therefore increases the magnetic field produced by the electromagnet. This increased magnetic field allows the electromagnet to pick up more paper clips. So, the correct response is: More coils of wire increases the strength of the electromagnet.