SAT Subject Physics Practice Question 95: Answer and Explanation

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Question: 95

5. Due to the magnetic force, a positively charged particle executes uniform circular motion within a uniform magnetic field, B. If the charge is q and the radius of its path is r, which of the following expressions gives the magnitude of the particle’s linear momentum?

A. qBr
B.
C.
D.
E.

Correct Answer: A

Explanation:

The magnetic force provides the centripetal force on the charged particle. Therefore,

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