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Electronic Devices and Circuits

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

10 eV
0.78 eV
2 eV
5 eV

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Electronic Devices and Circuits
Which variety of copper has the best conductivity?

Pure annealed copper
Copper containing traces of silicon
Hard drawn copper
Induction hardened copper

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

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

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

Reverse bias
Zero or reverse bias
Zero bias
Forward bias

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Electronic Devices and Circuits
Light dependent resistors are

Highly doped semiconductor
Lightly doped semiconductor
Either A or B
Intrinsic semiconductor

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

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

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