Electronic Principles
Doubling the operating frequency of a purely inductive circuit:

doubles the amount of current through the inductors
cuts the current through the inductors one-half
None of these
has no effect on the current through the inductors
increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit

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Electronic Principles
When a series 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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