Question

A student built a simple electromagnet with copper wire iron bolt and 1.5 volt battery the electromagnet was able to lift a paper clip for 3 centimeters away what action will decrease the strength of the electromagnet? A. He can reverse the orientation of the battery b. He can replace the 1.5 volt battery with a battery of higher voltage c. He can use a thicker piece of copper wire d. He can use a longer piece of wire that wraps more times around the bolt

Answer 1

The correct answer is c. He can use a thicker piece of copper wire.

Thicker wire will have a lower resistance, allowing more current to flow through the wire, which will increase the strength of the magnetic field produced by the electromagnet.