CUET · PHYSICS · PYQ PAPER 2025
In the depletion region of an unbiased p-n junction diode there are
- A mobile ions
- B immobile ions
- C electrons
- D holes
Answer & Solution
Correct Answer
(B) immobile ions
Step-by-step Solution
Detailed explanation
In an unbiased p-n junction, the depletion region is formed when mobile charge carriers (electrons from the n-side and holes from the p-side) diffuse across the junction and recombine. This process leaves behind immobile positive donor ions on the n-side and immobile negative…
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