The plot below shows the time dependent voltage trace for an unknown voltage sou

Question

The plot below shows the time dependent voltage trace for an unknown voltage source. Using a ruler and pencil, and calculations as required, determine the following quantities for this voltage waveform: 1) the maximum voltage amplitude, V_0; 2) the rms voltage, V_rms; 3) the waveform period; and 4) the frequency of the voltage source. Choose from one of the correct answers below. a) V_0 = 170 V, V_rms = 85 V, tau = 8.35 msec; f = 120 Hz. b) V_0 = 165 V, V_rms = 113 V, tau = 8.35 msec; f = 120 Hz. c) V_0 = 170 V, V_rms = 120 V, tau = 16.7 msec; f = 60 Hz. d) V_0 = -165 V, V_rms = 82.5 V, tau = 20 msec; f = 50 Hz.

Explanation / Answer

vo = 170 V

vrms = 170/(2)^0.5 =120 V

from figure T = 16.7 ms

f = 1/0.0167 = 60 Hz

correct option is (c)

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