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
28.4 mA
24.2 mA
None of these
34.4 mA

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Electronic Principles
Voltage is

None of these
The flow of charged particles through a material
The number of free electrons in an atom
Trie force that causes electrons to flow
The smallest electrically charged particle

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Electronic Principles
One henry of inductance is defined as:

None of these
the amount of inductance required to change the frequency of a current by 1 Hz
the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
the amount of counter emf required to reduce a current to 1 A
the number of turns of wire in an inductor multiplied by the amount of current flowing through it

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