Question

The circuit below shows a 6.0 V battery In a circuit with three resistors, labeled 1, 2 and 3. If each resistor has a resistance of 6.0 ohms, what is the rate at which energy is used by resistor 2?

• A. 10 W
• B. 36.0 W
• C. 6.0 W
• D. 24.0 W
• E. 18.0 W

Answer 1

Answer: (C)

6.0 W

Given : $R_2=6.0$ ohms

Voltage drop across resistor $R_2$, $V=6.0$ volts

Thus power used by $R_2$, $P=\frac{V^2}{R_2}=\frac{(6.0{)}^2}{6.0}=6.0$ W