SAT Subject Physics Practice Question 535: Answer and Explanation
6. 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 voltage from point A to point G?
Correct Answer: A
The correct answer is (A). The voltage measurement throughout the circuit decreases as the distance from point A increases and the number of resistors the current has passed through increases. Each increase in the resistance produces a corresponding decrease in voltage.