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
18.8 V
20 V
0.17 V

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Electronic Principles
One henry of inductance is defined as:

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

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Electronic Principles
What is a negative ion?

None of these
An atom that contains more electrons than neutrons
An atom that contains more protons than electrons
An atom that contains more electrons than protons
An atom that contains more protons than neutrons

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