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Electronic Devices and Circuits

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
0.99
99
100

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

5 eV
2 eV
0.78 eV
10 eV

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Electronic Devices and Circuits
Piezoelectric quartz crystal resonators find application where

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

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Electronic Devices and Circuits
Which of the following has highest resistivity?

Mineral oil
Air
Mica
Paraffin wax

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Electronic Devices and Circuits
In a bipolar transistor, the emitter base junction has

Zero bias
Zero or reverse bias
Forward bias
Reverse bias

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

Tunnel diode
PIN diode
Zener diode
Schottky diode

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