Electronic Principles
For a pure capacitor:

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

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

storing 1 V for 1 second
dissipating 1 W of power
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
When a series RLC circuit is operating at its resonant frequency:

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

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Electronic Principles
Which one of the following statements is true for the currents in a parallel RC circuit?

The total current is equal to the sum of the currents for the resistance and capacitance
None of these
The total current is less than the sum of the currents for the resistance and capacitance
The current always has the same amplitude and phase for every part of the circuit
The total current. is greater than the sum of the currents for the resistance and capacitance

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