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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
2 eV
10 eV

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

True
False

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Electronic Devices and Circuits
Silicon is not suitable for fabrication of light emitting diodes because it is

Narrowband gap semiconductor
An indirect band gap semiconductor
Wideband gap semiconductor
Direct band gap semiconductor

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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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Electronic Devices and Circuits
The amount of photoelectric emission current depends on

None of these
Both frequency and intensity of incident radiation
Intensity of incident radiation
Frequency of incident radiation

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

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

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