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Exam Questions Papers - Engineering

Q1:

A periodic voltage has following values for equal time intervals changing suddenly from one value to next : 0, 5, 10, 20, 50, 60, 50, 20, 10, 5, 0, - 5, - 10 etc.
What would be the RMS value of a sine wave having the same peak value as that of the above mentioned periodic wave?

A 42.2 V

B 19.098 V

C 38.2 V

D none of these

ANS:A - 42.2 V

R.M.S. value of a sine wave of the square peak == 42.2 V.