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Q.
In forward biasing of the $p -n$ junction
AIPMTAIPMT 2011Semiconductor Electronics: Materials Devices and Simple Circuits
Solution:
In forward biasing, the positive terminal of the battery is connected to $p$-side and the negative terminal to $n$-side of $p-n$ junction. The forward bias voltage opposes the potential barrier. Due to it, the depletion region becomes thin.