CUET · PHYSICS · PYQ PAPER 2025
Below given are some statements about electronic devices:
(A) Diodes can be used for rectifying an ac voltage.
(B) For semiconductors, band gap energy \( E_g > 3 \, eV \).
(C) By changing the external applied voltage, junction barriers can be changed.
(D) p-n junction is the 'key' to all semiconductor devices.
Choose the correct answer from the options given below:
- A (A), (B) and (D) only
- B (A), (B) and (C) only
- C (B), (C) and (D) only
- D (A), (C) and (D) only
Answer & Solution
Correct Answer
(D) (A), (C) and (D) only
Step-by-step Solution
Detailed explanation
Statements (A), (C), and (D) are correct. Statement (B) is incorrect because for semiconductors, \( E_g \) is typically less than \( 3 \, eV \). Therefore, the correct answer is (A), (C) and (D) only.
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