Electronic Principles
Which one of the following statements is true for the impedance of a series RC circuit?

The impedance is equal to the sum of the resistance and capacitive reactance
The impedance is less than the sum of the resistance and capacitive reactance
The impedance is greater than the sum of the resistance and capacitive reactance
None of these
The impedance is greater than either the resistance or capacitive reactance but less than their sum

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Electronic Principles
What is the primary difference between primary and 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 must be recharged at a much slower rate that 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 can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged

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

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

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