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Alternating Current and Voltage - Engineering

Q1:

The average half-cycle value of a sine wave with a 40 V peak is

A 25.48 V

B 6.37 V

C 14.14 V

D 50.96 V

ANS:A - 25.48 V

v = 40 * sinwt.
Vavg = (1/π) * integral(sinwt) , wt from 0 toπ. (Half wave)
Vavg = 40/π * [cos(0) - cos(pi)]
Vavg = 80/π
Vavg = 25.47v.