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?
Responses
He can reverse the orientation of the battery.
He can reverse the orientation of the battery.
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 replace the 1.5-volt battery with a battery of higher voltage.