AC Fundamentals – 50

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50. Two series resistors are connected to an ac source. If there are 7.5 V rms across one resistor and 4.2 V rms across the other, the peak source voltage is ________.

(a) 16.54 V
(b) 1.65 V
(c) 10.60 V
(d) 5.93 V

Answer
Answer : (a)
Explanation
Explanation :

Vrms = Vmax / 1.414
Vmax = Vrms * 1.414 = (v1rms + v2rms) * 1.414 = (7.5 + 4.2) * 1.414 = 16.54 V.

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