Electronic Principles
The period of a waveform is:

None of these
the number of cycles completed in one second
the time required for the voltage to rise from 10% to 90% of the peak amplitude
equal to 0.707 times the peak amplitude
the time required to complete one full cycle

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Electronic Principles
Which one of the following statements is true for the voltage in a parallel RL circuit?

The total voltages is less than the sum of the voltages across the resistance and inductance
The total voltage is equal to the sum of the voltages across the resistance and inductance
The total voltage lags the total current by less than 90
None of these
The voltage always has the same amplitude and phase for every part of the circuit

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

None of these
cuts the current through the inductors one-half
doubles the amount of current through the inductors
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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