The voltage drop across a metal bar is $5.0 \mathrm {~V}$ while a current of $10.0 \mathrm {~mA}$ flows 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

Power dissipated is calculated using the formula $ P = VI $. Substituting the given values, $ P = 5.0 \, \text{V} \times 10.0 \, \text{mA} = 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 $5.0 \mathrm {~V}$