Electronic Principles
Thevenin theorem replaces a complicated circuit facing a load by an

Ideal voltage source and parallel resistor
None of these
Ideal voltage source and series resistor
Ideal current source and series resistor
Ideal current source and parallel resistor

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Electronic Principles
A low-pass filter:

passes higher-frequency signals and reduces lower-frequency signals
passes lower-frequency signals and reduces higher-frequency signals
reduces the level of all frequencies by a significant amount
None of these
has no effect on ac signals

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Electronic Principles
What is a free electron?

An electron that has no electrical charge
An electron that costs nothing
An electron that has twice the amount of charge of a normal electron
None of these
An electron that has been freed from its parent atom

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Electronic Principles
Waveforms are graphs that show:

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

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