Question

Malik 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. Select three ways Malik can improve the strength of his electromagnet.(4 points)
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 reverse the orientation of the battery.
He can reverse the orientation of the battery.

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

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 replace the iron rod with a wooden rod.

Answer 1

- He can replace the 1.5-volt battery with a battery of higher voltage.
- He can use a thicker piece of copper wire.
- He can use a longer piece of wire that wraps more times around the bolt.

Brief reasons: higher voltage and thicker wire increase current; more turns around the iron core increases the magnetic field strength.