SAT Subject Physics Practice Question 323: Answer and Explanation

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Question: 323

19. Two batteries are hooked together in an 21. A hydrogen electron gains enough energy electric circuit. Which of the following to rise from the n=1 to the n=5 energy statements is/are true? level. How much energy does it gain?

I. Maximum voltage is obtained when the batteries are wired in parallel.

II. Maximum voltage is obtained when the batteries are wired in series.

III. Maximum current capacity is obtained when the batteries are wired in parallel.

A. I only
B. II only
C. I and III only
D. II and III only
E. I, II, and III

Correct Answer: B

Explanation:

The correct answer is (B). The voltage of the two batteries in series adds together, providing a voltage equivalent to their sum.

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