SAT Subject Physics Practice Question 576: Answer and Explanation

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Question: 576

2. The current through a 20Ω resistor connected to a 12V battery is

A. .3 amperes.
B. .6 amperes.
C. .9 amperes.
D. 1.6 amperes.
E. 1.9 amperes.

Correct Answer: B


The correct answer is (B). According to Ohm's Law, the current is equal to I = V/r. Solving for the current, we have 12V/20Ω = .6 ampere.

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