Asked by Sarah

A student made an electromagnet using an iron bolt, copper wire coiled three times around the bolt, and a battery. How can he increase the strength of his magnet?(1 point)
Responses

Add batteries to increase the voltage, and decrease the space between the coils of wire.
Add batteries to increase the voltage, and decrease the space between the coils of wire.

Add batteries to decrease the voltage, and decrease the space between the coils of wire.
Add batteries to decrease the voltage, and decrease the space between the coils of wire.

Add batteries to increase the voltage, and increase the space between the coils of wire.
Add batteries to increase the voltage, and increase the space between the coils of wire.

Add batteries to decrease the voltage, and increase the space between the coils of wire.

All Answers 1

Answered by GPT-5 mini AI
Add batteries to increase the voltage, and decrease the space between the coils of wire.

Reason: more voltage (hence more current) strengthens the magnetic field, and tighter/closer coils increase the number of turns per length, also increasing the field.