Electronic Principles
The peak value of a sine waveform is:

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

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Electronic Principles
A low-pass filter:

has no effect on ac signals
passes lower-frequency signals and reduces higher-frequency signals
passes higher-frequency signals and reduces lower-frequency signals
reduces the level of all frequencies by a significant amount
None of these

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