An n-p-n transistor is biased to work as an amplifier which of the following statements is NOT corrects?
An n-p-n transistor is biased to work as an amplifier which of the following statements is NOT corrects?
The electrons go from emitter region to base region.
The holes go from base region to collector region.
The electrons go from base region to collector region.
The electrons go from collector region to base region.
Solution
The NOT correct statement is:
(4) The electrons go from collector region to base region.
- In an n-p-n transistor, current conduction mainly occurs due to the movement of electrons. Here's how it works:
1. (1) The electrons go from emitter region to base region - This is correct. The emitter injects electrons into the base.
2. (2) The holes go from base region to collector region - This is incorrect because holes do not play a significant role in conduction in an n-p-n transistor. Current in the base is primarily due to electrons combining with a small number of holes.
3. (3) The electrons go from base region to collector region - This is correct. Most of the electrons injected into the base are swept into the collector by the electric field.
4. (4) The electrons go from collector region to base region - This is NOT correct. Electrons move from the base to the collector, not the other way around.
Thus, the incorrect statement is (4).
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