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

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
doubles the amount of current through the inductors

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Electronic Principles
What is the difference between a conductor and an insulator?

An insulator allows current to flow much easier than a conductor does
An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all
A conductor allows current to flow much easier than an insulator does
The difference between conductors and insulators depends on how they are used
None of these

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Electronic Principles
In a pure inductor:

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

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