A battery of electromotive force (e.m.f.) 24.0 V and of negligible internal resistance is used in the circuit below.
The current from the battery is 150 mA. The current in resistor R1 R_1\,R1 is 60 mA. Resistors R2R_2R2, R3R_3R3, and R4 R_4\,R4 are identical.
What is the power dissipated in resistor R3R_3R3?
480 mW480\text{ mW}480 mW
720 mW720\text{ mW}720 mW
1080 mW1080\text{ mW}1080 mW
2160 mW2160\text{ mW}2160 mW