Question:
A p-n junction in reverse bias:
A p-n junction in reverse bias:
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Reverse = Resistance. The region grows wider to resist current flow.
Updated On: May 5, 2026
- Large current flows
- Depletion region widens, only tiny leakage current flows
- Depletion region narrows
- Breakdown occurs always
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Reverse biasing occurs when the n-side of a p-n junction is connected to the positive terminal and the p-side to the negative terminal of a battery.
Step 2: Meaning
This external voltage pulls majority carriers (holes and electrons) away from the junction.
Step 3: Analysis
As carriers move away, the layer of immobile ions at the junction grows, causing the depletion region to widen and the potential barrier to increase. This effectively blocks majority carrier flow.
Step 4: Conclusion
Consequently, only a very small reverse saturation current (leakage current) due to minority carriers flows through the junction. Final Answer: (B)
Reverse biasing occurs when the n-side of a p-n junction is connected to the positive terminal and the p-side to the negative terminal of a battery.
Step 2: Meaning
This external voltage pulls majority carriers (holes and electrons) away from the junction.
Step 3: Analysis
As carriers move away, the layer of immobile ions at the junction grows, causing the depletion region to widen and the potential barrier to increase. This effectively blocks majority carrier flow.
Step 4: Conclusion
Consequently, only a very small reverse saturation current (leakage current) due to minority carriers flows through the junction. Final Answer: (B)
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