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Optoelectronic Devices for JEE: 17 solved questions

Real JEE paper questions on optoelectronic devices, part of semiconductor electronics. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2013 to 2026. No sign-in needed to read them.

What this topic asks

• Photodiode and solar cell — 10 questions
• LED — 7 questions

All 17 questions with solutions

• The energy band gap of semiconducting material to produce violet (wavelength =4000 Å) LED is eV. (Round off t… JEE Main 25th July 1st Shift 2022
• Consider a situation in which reverse biased current of a particular P-N junction increases when it is expose… JEE Main 22nd July 2nd Shift 2021
• The maximum rated power of the LED is 2 mW and it is used in the circuit with input voltage of 5 V as shown i… JEE Main 6th April 1st Shift 2026
• Consider the following statements: A. The junction area of solar cell is made very narrow compared to a photo… JEE Main 24th Jan 1st Shift 2025
• A light emitting diode (LED) is fabricated using GaAs semiconducting material whose band gap is 1.42 eV. The… JEE Main 9th April 1st Shift 2024
• Conductivity of a photodiode starts changing only if the wavelength of incident light is less than 660 nm. Th… JEE Main 1st Feb 2nd Shift 2024
• Given below are two statements: ONE is labelled as Assertion (A) and the other is labelled as Reason (R). Ass… JEE Main 24th Jan 1st Shift 2023
• Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Ass… JEE Main 25th Jan 1st Shift 2023
• Which one of the following statement is not correct in the case of light emitting diodes? (A) It is a heavily… JEE Main 29th Jan 1st Shift 2023
• Identify the solar cell characteristics from the following options. [Figure: four I-V sketches. (a) current r… JEE Main 28th July 1st Shift 2022
• The photodiode is used to detect the optical signals. These diodes are preferably operated in reverse biased… JEE Main 25th June 1st Shift 2022
• LED is constructed from Ga-As-P semiconducting material. The energy gap of this LED is 1.9 eV. Calculate the… JEE Main 26th Feb 1st Shift 2021
• If a semiconductor photodiode can detect a photon with a maximum wavelength of 400 nm, then its band gap ener… JEE Main 3rd Sept 2nd Shift 2020
• With increasing biasing voltage of a photodiode, the photocurrent magnitude JEE Main 5th Sept 1st Shift 2020
• Identify the semiconductor devices whose characteristics are given below, in the order (i), (ii), (iii), (iv)… JEE Main 2016
• The I-V characteristic of an LED is [Figure: four sketches. (a) curves for R, Y, G, B drawn in the reverse (t… JEE Main 2013
• A potential divider circuit is connected with a dc source of 20 V, a light emitting diode of glow in voltage… JEE Main 8th April 2nd Shift 2024