Electronic Principles
A farad is defined as the amount of capacitance necessary for:

dissipating 1 W of power
storing 1 V for 1 second
None of these
changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing
causing an ac phase shift greater than 90 degree

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Electronic Principles
A high-pass filter:

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

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Electronic Principles
In a pure inductor:

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

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