A student 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 the student can increase the strength of his electromagnet.

Question

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

B.
He can reverse the orientation of the battery.

C.
He can replace the iron bolt with a wooden rod.

D.
He can add a switch between the battery and the iron bolt.

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

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

Answer 1

To increase the strength of the electromagnet, the student can select the following options:

A. He can use a thicker piece of copper wire. - A thicker wire has a lower resistance which can allow more current to flow, increasing the magnetic field strength.

E. He can replace the 1.5-volt battery with a battery of higher voltage. - A higher voltage battery will increase the current flowing through the wire, which strengthens the electromagnet.

F. He can use a longer piece of wire that wraps more times around the bolt. - Increasing the number of coils creates a larger magnetic field, enhancing the strength of the electromagnet.

Options B, C, and D do not effectively contribute to increasing the magnetic strength.