A device with a resistance of $200.0 \mathrm { k } \Omega$ is connected to a $10.0$ - $\mathrm { V }$ battery. How much power does the device use?

Question

Quizplus · Accepted Answer

The power used by the device can be calculated using the formula $P = \frac{V^2}{R}$, where $P$ is the power in watts, $V$ is the voltage in volts, and $R$ is the resistance in ohms. Substituting the given values, $P = \frac{(10.0)^2}{200,000} = 0.0005 \mathrm {~W}$ or $0.50 \mathrm {~mW}$.

A Device with a Resistance Of 200.0kΩ200.0 \mathrm { k } \Omega200.0kΩ

A Device with a Resistance Of $200.0 \mathrm { k } \Omega$