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?

10.17 V
None of these
20 V
0.17 V
18.8 V

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Electronic Principles
The north pole of a magnet is the one:

that has its molecules arranged in a random pattern
None of these
that would be repelled by the south pole of another magnet
that would be attracted to the earth's south magnetic pole
that would be attracted to the earth's north magnetic pole

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Electronic Principles
For a pure capacitor:

None of these
ac current is converted to dc voltage
ac current and voltage are exactly in phase
ac current leads the voltage by 90 degree
ac current lags the voltage by 90 degree

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