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?

None of these
0.17 V
18.8 V
10.17 V
20 V

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Electronic Principles
What is the difference between the kinds of charges for an electron and a proton?

None of these
An electron has a negative charge and a proton has a positive charge
An electron has a positive charge and a proton has a negative charge
An electron has a positive charge and a proton has no charge
An electron has a negative charge and a proton has no charge

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Electronic Principles
Which one of the following phrasers best describes flux density?

The concentration of lines of magnetic force
The opposition to a build-up of magnetic fields
The rate of change of the number of lines of magnetic force
The force that maintains lines of force
None of these

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