SAT Subject Physics Practice Question 183: Answer and Explanation

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Question: 183

29.

All six resistors in the circuit have the same resistance, R, and the battery is a source of constant voltage, V.

If the total resistance in the circuit is , the amount of current that passes through resistor a is what constant times ?

A.
B.
C.
D.
E.

Correct Answer: C

Explanation:

Using Ohm’s law in the form I = V/R, we find that the current through resistor a is I = V/(10R/3) = (3/10)(V/R).

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