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?

28.4 mA
34.4 mA
None of these
24.2 mA
68.4 mA

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Electronic Principles
Which one of the following statements is true for the impedance of a series RC circuit?

The impedance is less than the sum of the resistance and capacitive reactance
None of these
The impedance is equal to the sum of the resistance and capacitive reactance
The impedance is greater than either the resistance or capacitive reactance but less than their sum
The impedance is greater than the sum of the resistance and capacitive reactance

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Electronic Principles
Which one of the following statements applies to common auto batteries?

Auto batteries are primary dry-cell batteries
Auto batteries are secondary wet-cell batteries
None of these
Auto batteries are primary wet-cell batteries
Auto batteries are secondary dry-cell batteries

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Electronic Principles
Current is

The force that causes electrons to flow
The flow of charged particles through a material
The number of free electrons in an atom
None of these
An imbalance of electrical charges

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