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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
All of these
Insulators
Metals

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Electronic Devices and Circuits
Piezoelectric quartz crystal resonators find application where

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

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Electronic Devices and Circuits
As compared to bipolar junction transistor, a FET

Is less noisy
Has higher input resistance
All of these
Has better thermal stability

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Electronic Devices and Circuits
A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is

1.01
99
100
0.99

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Electronic Devices and Circuits
In which of these is reverse recovery time nearly zero?

Tunnel diode
Schottky diode
PIN diode
Zener diode

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

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

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