Electronic Principles
Norton's theorem replaces a complicated circuit facing a load by an

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

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

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

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Electronic Principles
For a pure capacitor:

None of these
ac current leads the voltage by 90 degree
ac current and voltage are exactly in phase
ac current is converted to dc voltage
ac current lags the voltage by 90 degree

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

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
Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries
None of these
Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged

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