SAT Subject Physics Practice Question 534: Answer and Explanation

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Question: 534

5. This question relates to the DC circuit shown below.

The values for current, voltage, and resistance in the circuit are graphed from point A through point G in the graphs directly below.

Which of the graphs shows the resistance from point A to point G?

A. A
B. B
C. C
D. D
E. E

Correct Answer: B


The correct answer is (B). The resistance through the circuit is cumulative. At each point the resistance has increased by the same amount. Remember that the resistors are all the same value. Graph B shows the resistance increase by the same value from point to point.

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