Electronic Principles
When applying a square waveform to a capacitor, the circuit tends to:

peak both the voltage and current waveforms
peak the voltage and round off the current waveforms
None of these
round off both the voltage and current waveforms
peak the current and round off the voltage waveforms

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Electronic Principles
A low-pass filter:

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

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