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

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

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Electronic Principles
Which one of the following phrasers best describes flux density?

None of these
The force that maintains lines of force
The rate of change of the number of lines of magnetic force
The concentration of lines of magnetic force
The opposition to a build-up of magnetic fields

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