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

Doping
Thermal energy
Free electrons
None of these
Valence electrons

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

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

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Electronic Principles
When a series RLC circuit is operating at its resonant frequency:

None of these
capacitive reactance is greater than the inductive reactance
inductive reactance is equal to the capacitive reactance
the difference between inductive and capacitive reactance is equal to the resistance
inductive reactance is greater than the capacitive reactance

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Electronic Principles
Waveforms are graphs that show:

None of these
the passage of time on the vertical axis and amplitude on the horizontal axis
amplitude on the vertical axis and frequency on the horizontal axis
frequency on the vertical axis and amplitude on the horizontal axis
amplitude on the vertical axis and the passage of time on the horizontal axis

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