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Electronic Devices and Circuits

Electronic Devices and Circuits
For a NPN bipolar transistor, what is the main stream of current in the base region?

Diffusion of electrons
Diffusion of holes
Drift of electrons
Drift of holes

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Electronic Devices and Circuits
At room temperature the current in an intrinsic semiconductor is due to

Holes and electrons
Electrons
Ions
Holes

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Electronic Devices and Circuits
Power diodes are generally

Germanium diodes
None of these
Either of the above
Silicon diodes

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Electronic Devices and Circuits
Free electrons exist in

Third band
Conduction band
Second band
First band

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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

1.01
0.99
100
99

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Electronic Devices and Circuits
In monolithic ICs, all the components are fabricated by

Evaporation
Oxidation
None
Diffusion process

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