The rms output voltage of an AC source is 210 V, and the operating frequency is 90 Hz. Write the equation giving the output voltage as a function of time t.

Answer 1

U₀=U√2 =210•1.41 = 297 V
ω=2πf =2π•90=180π rad/s
U=U₀ cos ωt= 297 cos 180πt

Answer 2

The rms output voltage of an AC source is 200 V and the operating frequency is 100 Hz.
a. Calculate the maximum value of the AC voltage.
b. Write the equation giving the output voltage as a function of time