Electronic Principles
At cut off, the Q point is at

upper end of the load line
infinity
middle of the load line
None of these
lower end of the load line

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Electronic Principles
A low-pass filter:

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

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