SAT Subject Physics Practice Question 84: Answer and Explanation

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Question: 84

2. For an ohmic conductor, doubling the voltage without changing the resistance will cause the current to

A. decrease by a factor of 4
B. decrease by a factor of 2
C. remain unchanged
D. increase by a factor of 2
E. increase by a factor of 4

Correct Answer: D

Explanation:

The equation I = implies that increasing V by a factor of 2 will cause I to increase by a factor of 2.

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