CUET · PHYSICS · PYQ PAPER 2025
An external voltage is applied across a diode such that the n-side is positive and the p-side is negative. As a result,
(A) the barrier height decreases
(B) the barrier height increases
(C) the depletion region widens
(D) the depletion region width decreases
(E) no change in barrier height
Choose the correct answer from the options given below:
- A (A) and (B) only
- B (C) and (E) only
- C (D) and (E) only
- D (B) and (C) only
Answer & Solution
Correct Answer
(D) (B) and (C) only
Step-by-step Solution
Detailed explanation
When an external voltage is applied across a diode such that the n-side is positive and the p-side is negative, it is reverse biased. In reverse bias, the barrier height increases and the depletion region widens. Therefore, options (B) and (C) are correct.
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