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

None of these
Valence electrons
Thermal energy
Free electrons
Doping

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Electronic Principles
Which one of the following is a statement of KirchhofFs voltage law?

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

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Electronic Principles
What is the difference between a conductor and an insulator?

An insulator allows current to flow much easier than a conductor does
None of these
The difference between conductors and insulators depends on how they are used
A conductor allows current to flow much easier than an insulator does
An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all

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

The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance
None of these
The total current in a parallel circuit is always less than the smallest amount of current
The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it
The same current always flows through every part of a parallel circuit

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