Electronic Principles
An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current?

68.4 mA
None of these
24.2 mA
34.4 mA
28.4 mA

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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 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 total current in a parallel circuit is equal to the total voltage multiplied by the total resistance
The same current always flows through every part of a parallel circuit
None of these

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Electronic Principles
The total capacitive reactance of a parallel capacitor circuit is:

None of these
less than the capacitance value of the smallest capacitor
equal to the sum of the individual capacitance values
equal to the source voltage divided by total current
equal to the sum of the individual capacitive-reactance values

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Electronic Principles
Doubling the operating frequency of a purely inductive circuit:

has no effect on the current through the inductors
increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit
None of these
cuts the current through the inductors one-half
doubles the amount of current through the inductors

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