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Electronic Devices and Circuits

Electronic Devices and Circuits
Free electrons exist in

Second band
Third band
Conduction band
First band

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Electronic Devices and Circuits
The forbidden energy gap between the valence band and conduction band will be least in case of

Insulators
All of these
Semiconductors
Metals

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Electronic Devices and Circuits
Fermi level is the amount of energy in which

An electron can have at room temperature
None of these
Must be given to an electron move to conduction band
A hole can have at room temperature

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Electronic Devices and Circuits
In the sale of diamonds the unit of weight is carat. One carat is equal to

200 mg
100 mg
500 mg
150 mg

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

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

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

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

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