9
QuizMultiple Choice

Magnetism and Electromagnetism — Test

Question 9 • Physics

Craig is modeling the discovery of electromagnetism. Which procedure should he use?

Answer
A
bringing a compass near a wire that has an electric current
B
moving a magnet into a coil of wire in a closed circuit
C
moving a magnet into a coil of wire in an open circuit
D
bringing a compass near a wire that has no electric current

Explanation

To model the discovery of electromagnetism, Craig should show that an electric current creates a magnetic field. Bringing a compass near a wire carrying current causes the compass needle to deflect, as in Ørsted’s experiment. A wire with no current will not produce this effect; the coil-and-magnet procedures instead model electromagnetic induction.

AI-written and checked against the verified answer.

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