SAT Subject Physics Practice Question 629: Answer and Explanation

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Question: 629

10. Electromagnetic induction occurs in a wire when a change occurs in the

A. current in the wire.
B. intensity of the electric field of the wire.
C. voltage applied to the wire.
D. magnetic field intensity applied to the wire.
E. resistance is added to the wire.

Correct Answer: D


The correct answer is (D). Current is induced into a wire when the wire is placed in a changing magnetic field because of the moving line of flux crossing the wire. This is one of the ways a current is magnetically induced into a wire.

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