Electronic Principles
A current source has an internal resistance of 100 kW. What is the largest load resistance if the current source must appear stiff?

None of these
20 k Ohm
2 k Ohm
10 k Ohm
1 k Ohm

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Electronic Principles
What is the difference between the kinds of charges for an electron and a proton?

None of these
An electron has a positive charge and a proton has no charge
An electron has a negative charge and a proton has a positive charge
An electron has a positive charge and a proton has a negative charge
An electron has a negative charge and a proton has no charge

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Electronic Principles
Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?

The voltage remains at one polarity and at a steady level
The voltage remains at one polarity but changes value periodically
None of these
The voltage reverses polarity periodically
The voltage causes current to flow in two directions at the same time

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