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lesson pretestMultiple Choice

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Question 1 • Physics

Which describes Michael Faraday’s work with electricity and magnetism?

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

Explanation

Faraday discovered electromagnetic induction: a changing magnetic field can produce an electric current in a conductor. The observation of a compass needle deflecting near a wire carrying current was made by Hans Christian Ørsted, not Faraday, so choice D correctly matches Faraday’s work.

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