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Application of a forward bias to a p–n junction

1. widens the depletion zone
2. increases the potential difference across the depletion zone
3. increases the number of donors on the n side
4. decreases the electric field in the depletion zone

Correct answer: decreases the electric field in the depletion zone

Solution

In forward bias, the external voltage reduces the potential barrier, causing the electric field in the depletion zone to decrease, facilitating charge carrier movement.

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