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

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

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

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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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