The voltage drop across a metal bar is $5.0 \mathrm {~V}$ while there is a current of $10.0 \mathrm {~mA}$ through it.How much power does this bar dissipate?
A)50 mW
B)500 μW
C)2.5 kW
D)0.50 kW

Question

Quizplus · Accepted Answer

The power dissipated by the bar can be calculated using the formula $P = IV$, where $I$ is the current in amperes and $V$ is the voltage in volts. Substituting the given values, $P = 10.0 \times 10^{-3} \, \text{A} \times 5.0 \, \text{V} = 50 \times 10^{-3} \, \text{W} = 50 \, \text{mW}$.

The Voltage Drop Across a Metal Bar Is 5.0 V5.0 \mathrm {~V}5.0 V

The Voltage Drop Across a Metal Bar Is $5.0 \mathrm {~V}$