Electronic Principles
To get the Norton current, you have to

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

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Electronic Principles
The period of a waveform is:

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

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