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?

18.8 V
0.17 V
None of these
20 V
10.17 V

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Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

Current flowing through a conductor generates a magnetic field
Current is induced in a conductor that is moving through a magnetic field
Like magnetic poles repel, while unlike poles attract
None of these
Like magnetic poles attract, while unlike poles repel

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