SAT Subject Physics Practice Question 184: Answer and Explanation

Next steps

Question: 184

30.

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

If the power dissipated by resistor e is P, how much power is dissipated by resistor f ?

A.
B.
C.
D. P
E. 2P

Correct Answer: D

Explanation:

The power dissipated by a resistor carrying current is given by P = IV or by P = I2R. Since resistors e and f carry the same current I (because they’re in series) and have the same resistance R, they dissipate the same power.

Previous       Next