The peak value of a sine waveform is: A. the amplitude at 70.7% of the maximum value B. the amplitude at 90% of the maximum value C. the amplitude at 1.41 times the maximum value D. the maximum positive or negative value E. None of the above

The correct answer is: D. the maximum positive or negative value.

A sine wave is a periodic function of time that

Option A is incorrect because the amplitude at 70.7% of the maximum value is called the root mean square (RMS) value.

Option B is incorrect because the amplitude at 90% of the maximum value is called the half-power point.

Option C is incorrect because the amplitude at 1.41 times the maximum value is called the peak-to-peak value.

Option E is incorrect because the maximum positive or negative value is the peak value.