Electronic Principles
Current is

None of these
The flow of charged particles through a material
The number of free electrons in an atom
An imbalance of electrical charges
The force that causes electrons to flow

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

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

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Electronic Principles
The rms value of a sine waveform is:

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

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