Electronic Principles
Which one of the following properties of a magnetic circuit can be directly compared to voltage in an electrical circuit?

Reluctance
Flux density
Magnetomotive force
None of these
Number of lines of force

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Electronic Principles
Which one of the following statements most accurately applies to the frequency of a waveform?

None of these
The actual frequency of a sine waveform is 1.41 times the working frequency
The higher the amplitude of a waveform, the higher its frequency
Unless specified otherwise, the frequency of a waveform is assumed to be 60 Hz
The longer the period of a waveform, the lower its frequency

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

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

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