Electronics and Communication Engineering (ECE) Exam > Electronics and Communication Engineering (ECE) Questions > In a pnp-BJT, when the E-B junction is forwar...
Start Learning for Free
In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?
- a)Increases
- b)Decreases
- c)Remains same
- d)Can’t be determined
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
In a pnp-BJT, when the E-B junction is forward biased and no voltage i...
On application of a forward bias voltage across E-B junction, the width of the depletion region decreases.
Free Test
FREE
| Start Free Test |
Community Answer
In a pnp-BJT, when the E-B junction is forward biased and no voltage i...
Understanding the PNP-BJT Configuration
In a PNP Bipolar Junction Transistor (BJT), the operation of the Emitter-Base (E-B) junction and the Collector-Base (C-B) junction is crucial to its function. Let's analyze what happens when the E-B junction is forward biased.
Forward Biasing the E-B Junction
- When the E-B junction is forward biased, the application of a positive voltage to the Emitter relative to the Base reduces the barrier potential.
- This reduction allows charge carriers (holes in the case of PNP) to flow from the Emitter into the Base.
Effect on the Depletion Region Width
- The depletion region is formed at the junction due to the ionized donor and acceptor atoms.
- In a forward-biased condition, the electric field across the junction decreases, causing the depletion region to decrease in width.
Why Does the Depletion Region Decrease?
- Forward biasing injects charge carriers into the junction, which neutralizes the fixed charges in the depletion region.
- As a result, the potential barrier is lowered, and the recombination of holes and electrons becomes more favorable.
- This results in a thinner depletion region, allowing for easier movement of carriers across the junction.
Conclusion
- Therefore, when the E-B junction is forward biased and no voltage is applied across the C-B junction, the width of the depletion region in the E-B junction decreases.
- This behavior is fundamental to the operation of BJTs and is essential for their amplification and switching capabilities.
In summary, the correct answer is option 'B': the width of the depletion region decreases.
In a PNP Bipolar Junction Transistor (BJT), the operation of the Emitter-Base (E-B) junction and the Collector-Base (C-B) junction is crucial to its function. Let's analyze what happens when the E-B junction is forward biased.
Forward Biasing the E-B Junction
- When the E-B junction is forward biased, the application of a positive voltage to the Emitter relative to the Base reduces the barrier potential.
- This reduction allows charge carriers (holes in the case of PNP) to flow from the Emitter into the Base.
Effect on the Depletion Region Width
- The depletion region is formed at the junction due to the ionized donor and acceptor atoms.
- In a forward-biased condition, the electric field across the junction decreases, causing the depletion region to decrease in width.
Why Does the Depletion Region Decrease?
- Forward biasing injects charge carriers into the junction, which neutralizes the fixed charges in the depletion region.
- As a result, the potential barrier is lowered, and the recombination of holes and electrons becomes more favorable.
- This results in a thinner depletion region, allowing for easier movement of carriers across the junction.
Conclusion
- Therefore, when the E-B junction is forward biased and no voltage is applied across the C-B junction, the width of the depletion region in the E-B junction decreases.
- This behavior is fundamental to the operation of BJTs and is essential for their amplification and switching capabilities.
In summary, the correct answer is option 'B': the width of the depletion region decreases.
Attention Electronics and Communication Engineering (ECE) Students!
To make sure you are not studying endlessly, EduRev has designed Electronics and Communication Engineering (ECE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electronics and Communication Engineering (ECE).
|
Explore Courses for Electronics and Communication Engineering (ECE) exam
|
|
Similar Electronics and Communication Engineering (ECE) Doubts
Top Courses for Electronics and Communication Engineering (ECE)View all
In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer?
Question Description
In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer?.
In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer?.
Solutions for In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electronics and Communication Engineering (ECE).
Download more important topics, notes, lectures and mock test series for Electronics and Communication Engineering (ECE) Exam by signing up for free.
Here you can find the meaning of In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice In a pnp-BJT, when the E-B junction is forward biased and no voltage is applied across C-B junction, what happens to the width of the depletion region in the E-B junction?a)Increasesb)Decreasesc)Remains samed)Can’t be determinedCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Electronics and Communication Engineering (ECE) tests.
|
|
Explore Courses for Electronics and Communication Engineering (ECE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
x
![]()
For Your Perfect Score in Electronics and Communication Engineering (ECE)
The Best you need at One Place
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup