Learn

Friday, 9 October

JEE Main 2026 · PhysicsMultiple choiceSingle correctMediumApplication

JEE Main 8 April 2026, Shift 2, Physics Q43

Question 43 of 75 in this shift, Physics question 18 of 25, Section A.

K1K_1 and K2K_2 be the maximum kinetic energies of photoelectrons emitted from a surface of a given material for the light of wavelength λ1\lambda_1 and λ2\lambda_2, respectively. If λ1=2λ2\lambda_1 = 2\lambda_2 then the work function of material is given by :
  1. (1)K2+2K1K_2 + 2K_1
  2. (2)2K2−K12K_2 - K_1
  3. (3)K1−2K2K_1 - 2K_2
  4. (4)K2−2K1K_2 - 2K_1Official answer

Official answer

Option 4

NTA final key.

Chapter
Dual Nature of Radiation and Matter
Topic
Photoelectric Effect
Idea tested
Solving via Two Wavelength Data Points

Same idea in other shifts

Asked 2× in all
  1. 25 Jul 2022, Shift 1 · Q47A metal exposed to light of wavelength 800800 nm and and emits photoelectrons with a certain kinetic energy. The maximum kinetic energy of…MediumSingle 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 42 of the 174 JEE Main shifts held from 2017 to 2026.