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

solar cell
thermocouple
None of these
piezoelectric devices
chemical cell

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Electronic Principles
Which one of the following statements most accurately describes the nature of inductive reactance?

Inductive reactance is an opposition to current flow in ac circuits
None of these
Inductive reactance is a force that tends to overcome the effects of counter emf
Inductive reactance is an opposition to current flow in dc circuits
Inductive reactance is another term for counter emf

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Electronic Principles
A high-pass filter:

passes higher-frequency signals and reduces lower-frequency signals
None of these
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

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

All of these
The voltage waveform for each component always has the same amplitude and phase as the applied voltage
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

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