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- How to solve this problem- - Electronic devices - JEE Main
When transistor is used as an amplifier
- Option 1)
electrons move from base to collector
- Option 2)
holes move from emitter to base
- Option 3)
electrons move from collector to base
- Option 4)
holes move from base to emitter.
Answers (1)
As we learnt in
Transistor -
Three layered semiconducting device .
NPN or PNP
- wherein
1. Emitter is heavily doped
2. collector is moderately doped .
3. Base is lightly doped & very thin
In npn junction, Emitter-Base is in forward biased. So electron will move from emitter to Base. Base and collector are at reverse bias hence electron will move from Base to covector.
Correct option is 1.
Option 1)
electrons move from base to collector
This is the correct option.
Option 2)
holes move from emitter to base
This is an incorrect option.
Option 3)
electrons move from collector to base
This is an incorrect option.
Option 4)
holes move from base to emitter.
This is an incorrect option.
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