Electronic Principles
A circuit has two different voltage sources that are connected in a series-aiding form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

7.5 V
16 V
8 V
None of these
15 V

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

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
The impedance is less 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
A high-pass filter:

passes higher-frequency signals and reduces lower-frequency signals
has no effect on ac signals
passes lower-frequency signals and reduces higher-frequency signals
increases the level of all frequencies by a significant amount
None of these

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