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Electronic Devices and Circuits

Electronic Devices and Circuits
The forbidden energy gap between the valence band and conduction band will be least in case of

Semiconductors
Metals
Insulators
All of these

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Electronic Devices and Circuits
Permalloy is

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

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Electronic Devices and Circuits
In the sale of diamonds the unit of weight is carat. One carat is equal to

200 mg
500 mg
150 mg
100 mg

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Electronic Devices and Circuits
An electron in the conduction band

Has lower energy than the electron in the valence band
Has higher energy than the electron in the valence band
Jumps to the top of the crystal
Loses its charge easily

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Electronic Devices and Circuits
Fermi level is the amount of energy in which

An electron can have at room temperature
Must be given to an electron move to conduction band
None of these
A hole can have at room temperature

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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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