Electronic Principles
To get the Thevenin voltage, you have to

Open the load resister
Short the load resistor
Open the voltage source
Short the voltage source
None of these

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Electronic Principles
The period of a waveform is:

the number of cycles completed in one second
the time required to complete one full cycle
equal to 0.707 times the peak amplitude
None of these
the time required for the voltage to rise from 10% to 90% of the peak amplitude

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Electronic Principles
A high-pass filter:

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

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