Electronic Principles
The peak value of a sine waveform is:

the maximum positive or negative value
the amplitude at 70.7% of the maximum value
the amplitude at 1.41 times the maximum value
None of these
the amplitude at 90% of the maximum value

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Electronic Principles
Waveforms are graphs that show:

None of these
the passage of time on the vertical axis and amplitude on the horizontal axis
amplitude on the vertical axis and the passage of time on the horizontal axis
amplitude on the vertical axis and frequency on the horizontal axis
frequency on the vertical axis and amplitude on the horizontal axis

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