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Electronic Devices and Circuits

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

0.78 eV
5 eV
10 eV
2 eV

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Electronic Devices and Circuits
The depletion layer width of Junction

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

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Electronic Devices and Circuits
Piezoelectric quartz crystal resonators find application where

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

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Electronic Devices and Circuits
If too large current passes through the diode

Excessive heat may damage the diode
Diode will emit light
All electrons will leave
All holes will freeze

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Electronic Devices and Circuits
Which one of the following is not a characteristic of a ferroelectric material?

Ferroelectric characteristic only above the curie point
High dielectric constant
No hysteresis
Electric dipole moment

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

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

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