Question:medium
If p-n junction diode is forward biased, then
If p-n junction diode is forward biased, then
Show Hint
Forward Bias = Narrow Depletion Layer = High Current.
Updated On: Jun 19, 2026
- electric conduction is not possible.
- width of depletion layer decreases.
- width of depletion layer increases.
- barrier voltage increases.
Show Solution
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
The question asks about the physical changes at a p-n junction during forward biasing.
Step 2: Detailed Explanation:
In forward biasing, the positive terminal of the battery is connected to the p-region and the negative to the n-region.
1. This external field opposes the internal barrier field.
2. Majority carriers (holes from p-side and electrons from n-side) are pushed towards the junction.
3. This neutralizes some of the immobile ions in the depletion region.
4. As a result, the width of the depletion layer decreases and the barrier potential height is reduced.
Step 3: Final Answer:
The width of the depletion layer decreases during forward bias.
The question asks about the physical changes at a p-n junction during forward biasing.
Step 2: Detailed Explanation:
In forward biasing, the positive terminal of the battery is connected to the p-region and the negative to the n-region.
1. This external field opposes the internal barrier field.
2. Majority carriers (holes from p-side and electrons from n-side) are pushed towards the junction.
3. This neutralizes some of the immobile ions in the depletion region.
4. As a result, the width of the depletion layer decreases and the barrier potential height is reduced.
Step 3: Final Answer:
The width of the depletion layer decreases during forward bias.
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