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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
Semiconductors
Insulators
All of these

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

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

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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
Loses its charge easily
Jumps to the top of the crystal

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Electronic Devices and Circuits
The depletion layer width of Junction

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

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Electronic Devices and Circuits
Piezoelectric quartz crystal resonators find application where

Rectification of the signal is required
Modulation of signal is required
Signal amplification is required
Signal frequency control is required

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Electronic Devices and Circuits
The sensitivity of human eyes is maximum at

Red portion of spectrum
Green portion of spectrum
Violet portion of spectrum
White portion of spectrum

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