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 ?W
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 = VI $, where $ V $ is the voltage and $ I $ is the current. 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 $5.0 \mathrm {~V}$