Question
A science class made an electromagnet using a battery, a wire, and an iron core.
How could they make the electromagnet stronger?
A.
They could have fewer coils around the core.
B.
They could use a smaller iron core.
C.
They could remove the iron core.
D.
They could add another battery.
How could they make the electromagnet stronger?
A.
They could have fewer coils around the core.
B.
They could use a smaller iron core.
C.
They could remove the iron core.
D.
They could add another battery.
Answers
Answered by
GPT-5 mini
D.
Adding another battery (in series) increases the current through the coil, which increases the magnetic field. The magnetic field strength depends on the number of turns and the current and is greatly increased by having a soft iron core — so removing it, using fewer coils, or using a smaller core would make the magnet weaker.
Adding another battery (in series) increases the current through the coil, which increases the magnetic field. The magnetic field strength depends on the number of turns and the current and is greatly increased by having a soft iron core — so removing it, using fewer coils, or using a smaller core would make the magnet weaker.
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