Electronic Principles
Current is

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

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Electronic Principles
Which one of the following statements is true?

None of these
Power dissipation of a pure capacitor increases with operating frequency
All of these
Power dissipation of a pure capacitor decreases with operating frequency
There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency

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Electronic Principles
Which one of the following statements most accurately reflects the nature of ac power?

The current in an ac circuit changes direction periodically
The current in an ac circuit flows in one direction at a steady level
The current in an ac circuit flows in two directions at the same time
None of these
The current in an ac circuit flows in one direction, but changes value periodically

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Electronic Principles
Waveforms are graphs that show:

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

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