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In a n-p-n transistor amplifier, the collector current is 9 mA. If 90% of the electron from the emitter reach the collector, then
  • a)
    α = 0.9; β = 9.0
  • b)
    the base current is 10 mA
  • c)
    the emitter current is 1 mA
  • d)
    α = 9.0; β = 0.9
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
In a n-p-n transistor amplifier, the collector current is 9 mA. If 90%...
Given Information:
Collector current = 9 mA
Emitter current reaching collector = 90%

Explanation:

Calculating α and β
- β = Collector current / Base current
- Given collector current = 9 mA
- Let's assume all the electrons from the emitter reach the collector (which is not the case in reality, but for simplicity)
- So, emitter current = collector current = 9 mA
- Base current = Collector current / β = 9 mA / β
- If 90% of the electrons from the emitter reach the collector, then the remaining 10% are lost, which is the base current
- Therefore, Base current = 0.1 * 9 mA = 0.9 mA
- So, β = 9 mA / 0.9 mA = 10
- α = Emitter current reaching collector / Total emitter current
- Given emitter current reaching collector = 90%
- Total emitter current = Collector current / α
- Total emitter current = 9 mA / 0.9 = 10 mA
- Therefore, α = 0.9
Hence, the correct answer is option A which states α = 0.9; β = 9.0.
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In a n-p-n transistor amplifier, the collector current is 9 mA. If 90% of the electron from the emitter reach the collector, thena)α = 0.9; β = 9.0b)the base current is 10 mAc)the emitter current is 1 mAd)α = 9.0; β = 0.9Correct answer is option 'A'. Can you explain this answer?
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In a n-p-n transistor amplifier, the collector current is 9 mA. If 90% of the electron from the emitter reach the collector, thena)α = 0.9; β = 9.0b)the base current is 10 mAc)the emitter current is 1 mAd)α = 9.0; β = 0.9Correct answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In a n-p-n transistor amplifier, the collector current is 9 mA. If 90% of the electron from the emitter reach the collector, thena)α = 0.9; β = 9.0b)the base current is 10 mAc)the emitter current is 1 mAd)α = 9.0; β = 0.9Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a n-p-n transistor amplifier, the collector current is 9 mA. If 90% of the electron from the emitter reach the collector, thena)α = 0.9; β = 9.0b)the base current is 10 mAc)the emitter current is 1 mAd)α = 9.0; β = 0.9Correct answer is option 'A'. Can you explain this answer?.
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