12
QuizMultiple Choice

Magnetism and Electromagnetism — Test

Question 12 • Physics

Which describes Hans Oersted’s work with electricity and magnetism?

Answer
A
He discovered electromagnetic induction after seeing a compass needle deflected by a flowing electric current.
B
He discovered electromagnetic induction after seeing a changing magnetic field generate an electric current.
C
He discovered electromagnetism after seeing a changing magnetic field generate an electric current.
D
He discovered electromagnetism after seeing a compass needle deflected by a flowing electric current.

Explanation

Oersted found that an electric current could affect a compass needle: when current flowed through a wire near the compass, the needle deflected. This showed a connection between electricity and magnetism, called electromagnetism. Electromagnetic induction—generating current through a changing magnetic field—is associated with Faraday’s work, not Oersted’s.

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