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
capacitive reactance is greater than the inductive reactance
inductive reactance is greater than the capacitive reactance
None of these

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Electronic Principles
What is a free electron?

An electron that has no electrical charge
None of these
An electron that has been freed from its parent atom
An electron that has twice the amount of charge of a normal electron
An electron that costs nothing

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Electronic Principles
For a pure capacitor:

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

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