What is the average power dissipation in a series RC circuit if R = 2.12 kΩ,C = 2.25 µF,and V = (267 V)cos 479t?
A) 14.1 W
B) 33.6 W
C) 16.8 W
D) 20.0 W
E) 39.9 W

Question

What is the average power dissipation in a series RC circuit if R = 2.12 kΩ,C = 2.25 µF,and V = (267 V)cos 479t?
A) 14.1 W
B) 33.6 W
C) 16.8 W
D) 20.0 W
E) ​39.9 W

Quizplus · Accepted Answer

The average power dissipation in a series RC circuit can be calculated using the formula P = Vrms^2 / R, where Vrms is the RMS voltage across the circuit.

First, we need to find the RMS voltage: 
Vrms = Vmax / sqrt(2) = 267 / sqrt(2) = 188.8 V

Then, we can plug in the values: 
P = Vrms^2 / R = (188.8)^2 / 2120 = 16.8 W

Therefore, the closest answer choice is A) 14.1 W.

What Is the Average Power Dissipation in a Series RC