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Electronic Devices and Circuits

Electronic Devices and Circuits
As compared to bipolar junction transistor, a FET

All of these
Has higher input resistance
Has better thermal stability
Is less noisy

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

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

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Electronic Devices and Circuits
The sensitivity of human eyes is maximum at

Green portion of spectrum
Red portion of spectrum
White portion of spectrum
Violet portion of spectrum

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

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

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Electronic Devices and Circuits
Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is

Normal to both current and magnetic field
In arbitrary direction
Antiparallel to magnetic field
In the direction of current

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Electronic Devices and Circuits
A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is

0.99
1.01
99
100

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