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

None of these
Thermal energy
Free electrons
Valence electrons
Doping

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

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

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Electronic Principles
Molecule is

None of these
A atom that has an excessive number of electrons in its outer orbit
The smallest particle of a substance that retains the properties of that substance
A atom that has a shortage of electrons in its outer orbit
A atom that flows whenever there is an imbalance of electrical charges between two points

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