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

Valence electrons
None of these
Thermal energy
Doping
Free electrons

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

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

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Electronic Principles
One henry of inductance is defined as:

the number of turns of wire in an inductor multiplied by the amount of current flowing through it
the amount of counter emf required to reduce a current to 1 A
the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
the amount of inductance required to change the frequency of a current by 1 Hz
None of these

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