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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

All of these
Metals
Insulators
Semiconductors

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

Mineral oil
Air
Paraffin wax
Mica

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Electronic Devices and Circuits
How many free electrons does a p type semiconductor has?

Only those produced by thermal energy
Only those produced by doping
Those produced by doping as well as thermal energy
Any of the above

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

Reverse bias
Zero or forward bias
Zero bias
Forward bias

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

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

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

10 eV
5 eV
0.78 eV
2 eV

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