Electronic Principles
A low-pass filter:

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

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Electronic Principles
When a parallel RLC circuit is operating at its resonant frequency:

inductive reactance is greater than the capacitive reactance
inductive reactance is equal to the capacitive reactance
capacitive reactance is greater than the inductive reactance
None of these
the difference between inductive and capacitive reactance is equal to the resistance

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