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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceOtherMediumConceptual

JEE Main 27 July 2022, Shift 2, Physics Q47

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

With reference to the observations in photo-electric effect, identify the correct statements from below : (A) The square of maximum velocity of photoelectrons varies linearly with frequency of incident light. (B) The value of saturation current increases on moving the source of light away from the metal surface. (C) The maximum kinetic energy of photo-electrons decreases on decreasing the power of LED (light emitting diode) source of light. (D) The immediate emission of photo-electrons out of metal surface can not be explained by particle nature of light/electromagnetic waves. (E) Existence of threshold wavelength can not be explained by wave nature of light/ electromagnetic waves. Choose the correct answer from the options given below :
  1. (1)(A) and (B) only
  2. (2)(A) and (E) onlyOfficial answer
  3. (3)(C) and (E) only
  4. (4)(D) and (E) only

Official answer

Option 2

NTA final key.

Chapter
Dual Nature of Radiation and Matter
Topic
Photoelectric Effect
Idea tested
Failure of Classical Wave Theory

Same idea in other shifts

Asked 2× in all
  1. 6 Apr 2024, Shift 1 · Q46Which of the following phenomena does not explain by wave nature of light. A. reflection B. diffraction C. photoelectric effect D.…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.