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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyConceptual

JEE Main 25 June 2022, Shift 1, Physics Q47

Question 47 of 90 in this shift, Physics question 17 of 30, Section A.

The photodiode is used to detect the optical signals. These diodes are preferably operated in reverse biased mode because :
  1. (1)fractional change in majority carriers produce higher forward bias current
  2. (2)fractional change in majority carriers produce higher reverse bias current
  3. (3)fractional change in minority carriers produce higher forward bias current
  4. (4)fractional change in minority carriers produce higher reverse bias currentOfficial answer

Official answer

Option 4

NTA final key.

Chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic
Semiconductor Diodes
Idea tested
Photodiode Reverse Bias Rationale

Same idea in other shifts

Asked 2× in all
  1. 22 Jul 2021, Shift 2 · Q18Consider a situation in which reverse biased current of a particular P-N junction increases when it is exposed to a light of wavelength…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.