Electronic Principles
Suppose the zener diode has a breakdown voltage of 10 V and zener resistance of 8.5 W, what is the additional voltage when the current is 20 mA?

0.17 V
None of these
18.8 V
10.17 V
20 V

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

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

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

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

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Electronic Principles
Voltage is

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

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