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For a NPN bipolar transistor what is the main stream of...

This question belongs to Electronics And Communications Engineering Electronic Devices And Circuits
Electronic Devices and Circuits
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For a NPN bipolar transistor, what is the main stream of current in the base region?

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Correct Answer: Option B
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3 Comments
Jubair Khan
Jubair Khan 12 months ago
due to diffusion of electrons
Sankar Rao
Sankar Rao 5 years ago
bcuz base has more concentration of holes and collector & emitter has low concentration of holes. so the main purpose of current in the base will be diffusion of holes bcuz diffusion occurs due to difference of concentration and goes from higher concentration to lower concentration
Sankar Rao
Sankar Rao 5 years ago
the Fermi level of metals is very near to conduction band or inside conduction band so the gap between conduction band and valence bend is near to zero
where as in semiconductor its near 4 e volts and in insulator its more than 5 e volt .
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