Question

Given are some diodes (P-N junction) and their bias for normal working. Match the correct entries in List-l with List-Il

List-1 (I) Zener dlode (II) Photo dlode (III) Light emitting diode (IV) Solar cell

List-II (A) Forward blas (B) Reverse Blas (without breakdown) (C) Reverse Blas (with breakdown) (D) Zero blas

• A. (I)-C, (II)-B, (III)-A, (IV)-D
• B. (I)-A, (II)-B, (III)-C, (IV)-D
• C. (I)-B, (II)-C, (III)-A, (IV)-D
• D. (I)-D, (II)-A, (III)-B, (IV)-C

Answer 1

Answer: (A)

(I)-C, (II)-B, (III)-A, (IV)-D

Answer 2

• Zener diode: Designed to operate in the reverse breakdown region for voltage regulation.
• Photodiode: Typically operated in reverse bias (without breakdown) to enhance sensitivity for light detection.
• Light emitting diode (LED): Operated in forward bias to achieve light emission through electron-hole recombination.
• Solar cell: Operates under illumination to convert light into electrical energy, characterized by self-generated voltage and current, best described as operating at zero bias or in the fourth quadrant of its I-V curve.