Question

Renaldo and Nasreen build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. When they test the electromagnet, it can pick up 6 paper clips. Their teacher wants all groups to pick up at least 10 paper clips. What could Renaldo and Nasreen do to increase the number of paper clips their electromagnet picks up? A) make the wire longer B) remove the nail from the center of the wire C) increase the number of loops of wire around the nail D) spread the loops of wire apart on the nail so they do not touch

Answer 1

C) increase the number of loops of wire around the nail, doing so increases the magnitude of current and thus produces more magnetic field around it.

Answer 2

Answer: C

Explanation:

An electromagnet can be created manually by taking a conductor which might be a nail and wrapping a wire around the conductor (nail). Connect both the ends of the wire to the positive and negative terminals of the battery. When the electricity is supplied to the wire, a magnetic field is developed which makes the apparatus acts like an electromagnet.

The force of attraction is based on the amount of electricity and the length of the wire. So, the most probable option given here is increasing the loops of the wire.