A transformer-coupled class A amplifier has a transformer turns ratio of 4:1 and a load resistance of 25 Ω. The peak-to-peak value of VCE is 12 V. What is the approximate load power for the circuit?
A) 45 mW
B) 160 mW
C) 90 mW
D) 60 mW

Question

Quizplus · Accepted Answer

The load power is given by P = V^2 / R, where V is the peak-to-peak voltage across the load and R is the load resistance. In this case, V = 12 V and R = 25 Ω, so P = 12^2 / 25 = 57.6 mW. The closest answer choice is 60 mW, so the answer is A.

A Transformer-Coupled Class a Amplifier Has a Transformer Turns Ratio