Question

A student made the electromagnet shown and used it to pick up one sewing pin. Which change to the electromagnet would most likely allow it to pick up two sewing pins?A. Double the length of the wires that connect it to the battery.B. Replace the nail with a thick roll if paper.C. Double the number of coils of wires around the nail.D. Replace the nail with a large bolt.

Answer 1

Answer: Double the number of coils of wires around the nail.

Explanation: Just did this on apex, mostly for their benefit.

Answer 2

C. Double the number of coils of wires around the nail.

Explanation:

In order to collect two sewing pins, the student must double the number of coils around the nail.