JEE Main 2020 · PhysicsMultiple choiceSingle correctEasyConceptual

JEE Main 5 September 2020, Shift 1, Physics Q19

Question 19 of 75 in this shift, Physics question 19 of 25.

With increasing biasing voltage of a photodiode, the photocurrent magnitude :

(1)increases initially and saturates finallyOfficial answer
(2)remains constant
(3)increases linearly
(4)increases initially and after attaining certain value, it decreases

Official answer

Option 1

NTA final key (Sep 2020).

Chapter: Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic: Semiconductor Diodes
Idea tested: Optoelectronic Diodes

Same idea in other shifts

Asked 3× in all

1 Feb 2024, Shift 2 · Q48Conductivity of a photodiode starts changing only if the wavelength of incident light is less than 660 nm. The band gap of photodiode is…MediumSingle correct
26 Feb 2021, Shift 1 · Q20LED is constructed from Ga-As-P semiconducting material. The energy gap of this LED is 1.9 eV. Calculate the wavelength of light emitted…EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.