Electronic Principles
At room temperature an intrinsic semiconductor has

No holes
many free electrons
a few free electrons and holes
many holes
None of these

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Electronic Principles
The total inductance of a series inductor circuit is:

less than the value of the smallest inductor
equal to the sum of the individual inductance values
equal to the source voltage divided by total current
None of these
equal to the sum of the individual inductive-reactance values

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Electronic Principles
Which one of the following statements is true for the voltages in a series RL circuit?

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

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Electronic Principles
Which one of the following is a direct statement of Ohm's law?

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
None of these
The total resistance of a parallel circuit is less than the value of the smallest resistance
The algebraic sum of currents entering and leaving a point is equal to zero

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