Electronic Principles
Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?

The voltage causes current to flow in two directions at the same time
None of these
The voltage remains at one polarity and at a steady level
The voltage reverses polarity periodically
The voltage remains at one polarity but changes value periodically

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

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

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