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Electronic Devices and Circuits

Electronic Devices and Circuits
Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface.

False
True

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Electronic Devices and Circuits
Forbidden energy gap in germanium at 0 K is about

5 eV
10 eV
2 eV
0.78 eV

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Electronic Devices and Circuits
In a bipolar transistor, the base collector junction has

Zero or forward bias
Zero bias
Forward bias
Reverse bias

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Electronic Devices and Circuits
For a NPN bipolar transistor, what is the main stream of current in the base region?

Diffusion of electrons
Drift of holes
Drift of electrons
Diffusion of holes

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Electronic Devices and Circuits
The depletion layer width of Junction

Is increased under reverse bias
Decreases with light doping
Is independent of applied voltage
Increases with heavy doping

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Electronic Devices and Circuits
Permalloy is

A conon-ferrous alloy used in aircraft industry
A nickel an iron alloy having high permeability
A polymer
A variety of stainless steel

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