SAT Subject Physics Practice Question 459: Answer and Explanation

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Question: 459


The electrical circuit shown has 1 ampere of current flowing in it. Answer the questions about the parts of the circuit listed between the points below by choosing the letter that correctly represents the quantity in question.

Between which two points is the voltage change the smallest?

A. Between points A→B
B. Between points B→C
C. Between points C→D
D. Between points D→E
E. Between points E→A

Correct Answer: A


The correct answer is (A). The smallest resistance in the circuit is 1 ohm. The smallest voltage drop in the circuit occurs across the smallest resistance.

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