An amplifier's power gain equals
A) ac input power divided by the ac output power.
B) ac output power divided by the ac input power.
C) ac output power divided by the power supply voltage.
D) ac output power divided by the ac input current.

Question

Quizplus · Accepted Answer

Power gain is defined as the ratio of output power to input power. Therefore, the correct choice is B, which is ac output power divided by ac input power. The other choices involve dividing by irrelevant quantities, and are therefore incorrect.

An Amplifier's Power Gain Equals