25
QuizMultiple Choice

Unit Test — Unit test

Question 25 • TX-Physics B

Which describes Michael Faraday’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 electromagnetism after seeing a compass needle deflected by a flowing electric current.
C
He discovered electromagnetic induction after seeing a changing magnetic field generate an electric current.
D
He discovered electromagnetism after seeing a changing magnetic field generate an electric current.

Explanation

Faraday discovered electromagnetic induction: a changing magnetic field can produce an electric current. The compass needle’s deflection near a flowing current showed that electricity can create magnetism, a discovery associated with Hans Christian Ørsted, not Faraday. Therefore, the correct choice is “He discovered electromagnetic induction after seeing a changing magnetic field generate an electric current.”

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