Electronic Principles
In a pure inductor:

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

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Electronic Principles
Waveforms are graphs that show:

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

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

The total current in a parallel circuit is always less than the smallest amount of current
The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it
None of these
The same current always flows through every part of a parallel circuit
The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance

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

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

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