Electronic Principles
Which one of the following statements most accurately reflects the nature of ac power?

None of these
The current in an ac circuit changes direction periodically
The current in an ac circuit flows in one direction at a steady level
The current in an ac circuit flows in two directions at the same time
The current in an ac circuit flows in one direction, but changes value periodically

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

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

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