The r.m.s. value of pure cosine function is_________?
Correct answer: B. 0.707 of peak value
- A. 0.5 of peak value
- B. 0.707 of peak value
- C. same as peak value
- D. zero
Explanation
A sinusoidal waveform, whether sine or cosine, has RMS value equal to its peak value divided by √2. Thus its RMS value is approximately 0.707 of the peak value.
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