Greg built a simple electromagnet with copper wire, an iron bolt, and a 1.5-volt battery. The electromagnet was able to lift a paper clip from 3 centimeters away. Which of the following is NOT a way Greg can improve the strength of his electromagnet?

Question

Responses

He can replace the 1.5-volt battery with a battery of higher voltage.
He can replace the 1.5-volt battery with a battery of higher voltage.

He can use a longer piece of wire that wraps more times around the bolt.
He can use a longer piece of wire that wraps more times around the bolt.

He can use a thicker piece of copper wire.
He can use a thicker piece of copper wire.

He can reverse the orientation of the battery.

Answer 1

The option that is NOT a way Greg can improve the strength of his electromagnet is:

He can reverse the orientation of the battery.

Reversing the orientation of the battery will change the direction of the magnetic field but will not increase the strength of the electromagnet. All the other options listed could potentially improve the strength of the electromagnet.