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

thermocouple
solar cell
electric device
None of these
chemical cell

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Electronic Principles
The total inductive reactance of a parallel inductor circuit is:

equal to the source voltage divided by total current
None of these
equal to the sum of the individual inductive-reactance values
less than the inductance value of the smallest inductor
equal to the sum of the individual inductance values

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Electronic Principles
Which one of the following statements is true for the currents in a parallel RL circuit?

The current always has the same amplitude and phase for every part of the circuit
None of these
The total current leads the total voltage by less than 90
The total current is less than the sum of the currents through the resistance and inductance
The total current is equal to the sum of the currents through the resistance and inductance

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Electronic Principles
The period of a waveform is:

None of these
the time required for the voltage to rise from 10% to 90% of the peak amplitude
the number of cycles completed in one second
the time required to complete one full cycle
equal to 0.707 times the peak amplitude

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

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

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