Electronic Principles
A device that converts thermal energy to electrical energy is called a:

solar cell
chemical cell
thermocouple
None of these
piezoelectric devices

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Electronic Principles
Which one of the following statements best applies to a parallel RLC circuit?

The sum of the current is always less than the applied current
The current waveform for each component always has the same amplitude and phase as the applied current
None of these
All of these
The voltage waveform for each component always has the same amplitude and phase as the applied voltage

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Electronic Principles
A low-pass filter:

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

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