The mean value of sinusoidal emf over cycle is:
Correct answer: B. Zero
- A. Maximum
- B. Zero
- C. Maximum and minimum
- D. No change in emf
Explanation
Zero: The mean value of a sinusoidal emf over a cycle is zero. This is because the positive and negative values of the sinusoidal wave cancel each other out when averaged over a complete cycle. Therefore, the correct option is "Zero" as the mean value of a sinusoidal emf over a cycle is zero.
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
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About Phase of Alternating Current
Phase describes the position of an alternating voltage or current within its cycle and the phase difference between two sinusoidal quantities. The topic covers in phase signals, phase angle and lead or lag in resistive, inductive and capacitive circuits, rather than the amplitude or frequency of the supply.
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