An amplifier with an efficiency rating of 18% draws 3.25 W from its dc power supply. What is the maximum power it can deliver to its load?
A) 585 mW
B) 55 mW
C) 18 W
D) 58.5 mW

Question

Quizplus · Accepted Answer

The maximum power an amplifier can deliver to its load is calculated by multiplying the power it draws from its power supply by its efficiency. Here, $3.25 \, \text{W} \times 0.18 = 0.585 \, \text{W}$, or $585 \, \text{mW}$.

An Amplifier with an Efficiency Rating of 18% Draws 3