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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

Metals
Insulators
Semiconductors
All of these

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

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

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Electronic Devices and Circuits
Free electrons exist in

Third band
Second band
Conduction band
First band

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Electronic Devices and Circuits
Permalloy is

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

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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 electrons
Drift of holes
Diffusion of holes

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Electronic Devices and Circuits
For a P-N diode, the number of minority carriers crossing the junction depends on

Forward bias voltage
Potential barrier
None of these
Rate of thermal generation of electron hole pairs

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