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Electronic Principles

Electronic Principles
What causes the depletion layer?

None of these
Recombination
Barrier potential
Ions
Doping

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Electronic Principles
A device that converts thermal energy to electrical energy is called a:

solar cell
thermocouple
None of these
chemical cell
piezoelectric devices

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Electronic Principles
Holes act like:

Crystals
None of these
Positive charges
Negative charges
Atoms

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Electronic Principles
The rotating coil of wire in an electric motor is called the:

armature
None of these
brush
commutator
loop

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Electronic Principles
Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode

None of these
10 mA
12 mA
14 mA
11 mA

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Electronic Principles
An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current?

34.4 mA
24.2 mA
None of these
68.4 mA
28.4 mA

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