Electronic Principles
Doubling the operating frequency of an inductive circuit:

has no effect on the inductive reactance
multiplies the inductive reactance by 6.28
None of these
cuts the inductive reactance in half
doubles the amount of inductive reactance

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Electronic Principles
Waveforms are graphs that show:

the passage of time on the vertical axis and amplitude on the horizontal axis
amplitude on the vertical axis and the passage of time on the horizontal axis
frequency on the vertical axis and amplitude on the horizontal axis
amplitude on the vertical axis and frequency on the horizontal axis
None of these

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