Electronic Principles
Which one of the following phrasers best describes flux density?

None of these
The force that maintains lines of force
The concentration of lines of magnetic force
The opposition to a build-up of magnetic fields
The rate of change of the number of lines of magnetic force

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Electronic Principles
The rms value of a sine waveform is:

None of these
equal to 0.707 times the peak amplitude
equal to 1.41 times the peak amplitude
the number of cycles completed in one second
the time required to complete one full cycle

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Electronic Principles
Which one of the following statements best applies to a parallel RLC circuit?

The sum of the current is always less than the applied current
None of these
The voltage waveform for each component always has the same amplitude and phase as the applied voltage
All of these
The current waveform for each component always has the same amplitude and phase as the applied current

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