Electronic Principles
Waveforms are graphs that show:

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

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Electronic Principles
The total capacitance of a series capacitor circuit is:

equal to the sun of the individual capacitive-reactance values
equal to the source voltage divided by total current
None of these
less than the value of the smallest capacitor
equal to the sum of the individual capacitance values

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Electronic Principles
For a pure capacitor:

ac current leads the voltage by 90 degree
ac current is converted to dc voltage
ac current and voltage are exactly in phase
ac current lags the voltage by 90 degree
None of these

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Electronic Principles
A high-pass filter:

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

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