Electronic Principles
Suppose a current source has an Ideal current of 10 mA and an internal resistance of 20 MW. For what values of load resistance will the current source appear stiff?

20 k Ohm or more
200 k Ohm or less
None of these
20 km or less
200 k Ohm or more

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Electronic Principles
Which one of the following statements applies to common auto batteries?

Auto batteries are secondary wet-cell batteries
None of these
Auto batteries are secondary dry-cell batteries
Auto batteries are primary wet-cell batteries
Auto batteries are primary dry-cell batteries

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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
There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency
Power dissipation of a pure capacitor decreases with 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, but changes value 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

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Electronic Principles
What is the primary difference between primary and secondary cell batteries?

Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries
Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged
None of these
Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
Primary-cell batteries use chemical cells, whereas secondary-cell batteries use an alternative energy source, such as thermal or magnetic energy, to supplement their outputs

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