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Alternating Current and Voltage - Engineering

Q1:

A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is

A 4 V

B 4.6 V

C 1.6 V

D 11 V

ANS:A - 4 V

for 20% of the time - 8v, for 80% of the time - 3v.
Let's consider the T-time period,
Average = (20%(T) x 8 + 80%(T) x 3)/T.
Average voltage = 4v.