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If the barrier potential change with biasing of a p-n junction diode, then the barrier potential will.
- a)increase with reverse bias
- b)decrease with reverse bias
- c)increase with forward bias
- d)decrease with forward bias
Correct answer is option 'A,D'. Can you explain this answer?
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Verified Answer
If the barrier potential change with biasing of a p-n junction diode, ...
For a p-n junction diode, barrier potential decreases with forward and increases with reverse biasing.
The correct answers are: increase with reverse bias, decrease with forward bias
The correct answers are: increase with reverse bias, decrease with forward bias
Most Upvoted Answer
If the barrier potential change with biasing of a p-n junction diode, ...
Explanation:
When a p-n junction diode is biased, the barrier potential across the junction changes depending on the type of biasing applied. The barrier potential is the potential energy difference between the conduction band and valence band at the junction.
Reverse Bias:
- In reverse bias, the p-type region is connected to the negative terminal of the battery and the n-type region is connected to the positive terminal.
- This creates an electric field that opposes the flow of majority carriers (holes in the p-region and electrons in the n-region) across the junction.
- The barrier potential increases under reverse bias because the electric field created by the external bias opposes the potential barrier at the junction.
- The increased barrier potential makes it more difficult for majority carriers to cross the junction, resulting in a decrease in current flow.
Forward Bias:
- In forward bias, the p-type region is connected to the positive terminal of the battery and the n-type region is connected to the negative terminal.
- This creates an electric field that aids the flow of majority carriers across the junction.
- The barrier potential decreases under forward bias because the external bias aids the potential barrier at the junction.
- The decreased barrier potential allows majority carriers to easily cross the junction, resulting in an increase in current flow.
Summary:
- The barrier potential across a p-n junction diode increases with reverse bias because the external electric field opposes the potential barrier.
- The barrier potential across a p-n junction diode decreases with forward bias because the external electric field aids the potential barrier.
- Therefore, the correct answer is option A (increase with reverse bias) and option D (decrease with forward bias).
When a p-n junction diode is biased, the barrier potential across the junction changes depending on the type of biasing applied. The barrier potential is the potential energy difference between the conduction band and valence band at the junction.
Reverse Bias:
- In reverse bias, the p-type region is connected to the negative terminal of the battery and the n-type region is connected to the positive terminal.
- This creates an electric field that opposes the flow of majority carriers (holes in the p-region and electrons in the n-region) across the junction.
- The barrier potential increases under reverse bias because the electric field created by the external bias opposes the potential barrier at the junction.
- The increased barrier potential makes it more difficult for majority carriers to cross the junction, resulting in a decrease in current flow.
Forward Bias:
- In forward bias, the p-type region is connected to the positive terminal of the battery and the n-type region is connected to the negative terminal.
- This creates an electric field that aids the flow of majority carriers across the junction.
- The barrier potential decreases under forward bias because the external bias aids the potential barrier at the junction.
- The decreased barrier potential allows majority carriers to easily cross the junction, resulting in an increase in current flow.
Summary:
- The barrier potential across a p-n junction diode increases with reverse bias because the external electric field opposes the potential barrier.
- The barrier potential across a p-n junction diode decreases with forward bias because the external electric field aids the potential barrier.
- Therefore, the correct answer is option A (increase with reverse bias) and option D (decrease with forward bias).
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Community Answer
If the barrier potential change with biasing of a p-n junction diode, ...
For a p-n junction diode, barrier potential decreases with forward and increases with reverse biasing.
The correct answers are: increase with reverse bias, decrease with forward bias
The correct answers are: increase with reverse bias, decrease with forward bias
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If the barrier potential change with biasing of a p-n junction diode, then the barrier potential will.a)increase with reverse biasb)decrease with reverse biasc)increase with forward biasd)decrease with forward biasCorrect answer is option 'A,D'. Can you explain this answer?
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