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Semiconductor Electronic: Material, Devices And Simple Circuits — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsSemiconductor Electronic: Material, Devices And Simple Circuits2 Marks
Question
Explain how the width of depletion layer in a p-n junction diode changes when the junction is (i) forward biased (ii) reverse biased.
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Answer

  1. In forward biasing, the depletion layer decreases.

Reason: Majority charge carriers come closer to junction.

  1. In reverse biasing, the width of depletion layer increases.

Reason: The majority charge carries go farther away from the junction.

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