An AC voltage source,with a peak output of 200 V,is connected to a 50-W resistor.What is the effective (or rms)current in the circuit?
A)2.8 A
B)4.0 A
C)5.6 A
D)2.0 A

Question

Quizplus · Accepted Answer

To calculate the rms current we need to use the formula:

Irms = Vrms / R

where Vrms is the root-mean-square (rms) voltage, and R is the resistance.

The peak voltage is given as 200 V, so the rms voltage can be calculated as:

Vrms = Vp / sqrt(2) = 200 / 1.414 = 141.4 V

Now we can calculate the rms current:

Irms = Vrms / R = 141.4 / 50 = 2.828 A ≈ 2.8 A

Therefore, the best choice is A) 2.8 A.

An AC Voltage Source,with a Peak Output of 200 V,is