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

chemical cell
None of these
thermocouple
electric device
solar cell

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Electronic Principles
When a series RLC circuit is operating at its resonant frequency:

the difference between inductive and capacitive reactance is equal to the resistance
inductive reactance is greater than the capacitive reactance
None of these
inductive reactance is equal to the capacitive reactance
capacitive reactance is greater than the inductive reactance

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

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

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