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Friday, 9 October

JEE Main 2023 · PhysicsMultiple choiceTwo statementsEasyConceptual

JEE Main 13 April 2023, Shift 2, Physics Q47

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

Given below are two statements: Statement I : Out of microwaves, infrared rays and ultraviolet rays, ultraviolet rays are the most effective for the emission of electrons from a metallic surface. Statement II : Above the threshold frequency, the maximum kinetic energy of photoelectrons is inversely proportional to the frequency of the incident light. In the light of above statements, choose the correct answer form the options given below
  1. (1)Both Statement I and Statement II are true
  2. (2)Both Statement I and Statement II are false
  3. (3)Statement I is true but statement II is falseOfficial answer
  4. (4)Statement I is false but statement II is true

Official answer

Option 3

NTA final key.

Chapter
Dual Nature of Radiation and Matter
Topic
Photoelectric Effect
Idea tested
K_max versus Frequency Graph

Same idea in other shifts

Asked 2× in all
  1. 30 Jan 2024, Shift 2 · Q46For the photoelectric effect, the maximum kinetic energy (EkE_k) of the photoelectrons is plotted against the frequency (ν\nu) of the…EasySingle correctHas a figure

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.