Electronic Principles
An intrinsic semiconductor has some holes in it at room temperature. What causes these holes?

Free electrons
Doping
Valence electrons
Thermal energy
None of these

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Electronic Principles
A farad is defined as the amount of capacitance necessary for:

storing 1 V for 1 second
causing an ac phase shift greater than 90 degree
changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing
None of these
dissipating 1 W of power

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

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
equal to the source voltage divided by total current
None of these

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