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

Thermal energy
None of these
Doping
Free electrons
Valence electrons

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Electronic Principles
Which one of the following is a statement of Kirchhoffs current law?

The algebraic sum of currents in a loop is equal to zero
The current through a resistance is proportional to the value of resistance and the IR drop across it
None of these
The algebraic sum of currents entering and leaving a point is equal to zero
The total current in a parallel circuit is less than the value of the smallest current

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