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Electronic Devices and Circuits

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

Zero or reverse bias
Reverse bias
Zero bias
Forward bias

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

Air
Mineral oil
Paraffin wax
Mica

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Electronic Devices and Circuits
When avalanche breakdown occurs covalent bonds are not affected.

False
True

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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
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
Power diodes are generally

Germanium diodes
Silicon diodes
Either of the above
None of these

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