Question

Brielle tests the difference in the magnetic force of two electromagnets with different numbers of wire turns around the iron nails. She observes that the electromagnet with ten wire turns attracts more paper clips than the electromagnet with seven wire turns. What is her conclusion?
A.

Magnetic force increases with an increase in the number of wire turns around an iron nail.

B.

Magnetic force decreases with an increase in the number of wire turns around an iron nail.

C.

Magnetic force increases with a decrease in the number of wire turns around an iron nail.

D.

Magnetic force is not affected by a change in the number of wire turns around an iron nail.

Answer 1

A.

Magnetic force increases with an increase in the number of wire turns around an iron nail. More turns produce a stronger magnetic field, so the nail with ten turns attracted more paper clips than the one with seven turns.