Electronic Principles
At room temperature a conductor has low many holes?

Only those produced by thermal energy
less than the free electrons
None of these
Same number as free electrons
many

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

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
Inductive reactance is an opposition to current flow in ac circuits
None of these

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

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

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Electronic Principles
The total capacitive reactance of a parallel capacitor circuit is:

equal to the source voltage divided by total current
None of these
less than the capacitance value of the smallest capacitor
equal to the sum of the individual capacitive-reactance values
equal to the sum of the individual capacitance values

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Electronic Principles
Doubling the operating frequency of a purely inductive circuit:

doubles the amount of current through the inductors
increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit
has no effect on the current through the inductors
cuts the current through the inductors one-half
None of these

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