The average value of a sinusoidal wave is:

• A. 2 × maximum value
• B. 0.637 × maximum value
• C. √2 × maximum value
• D. 0.5 × maximum value

Answer: (B)

The average value of the sine wave over one complete cycle is actually zero. Hence, for a sine wave, the average value is defined over half the period. The average value expressed in terms of peak value is given by
Average value = 0.637 × peak value