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Friday, 9 October

JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyData or graph

JEE Main 30 January 2024, Shift 2, Physics Q46

Question 46 of 90 in this shift, Physics question 16 of 30, Section A.

For the photoelectric effect, the maximum kinetic energy (EkE_k) of the photoelectrons is plotted against the frequency (ν\nu) of the incident photons as shown in figure. The slope of the graph gives

The figure, in words

Graph of E_k (vertical) vs frequency nu (horizontal): straight line with positive slope starting at a point on the nu-axis (threshold), angle theta marked with the axis.
  1. (1)Planck's constantOfficial answer
  2. (2)Charge of electron
  3. (3)Work function of the metal
  4. (4)Ratio of Planck's constant to electric charge

Official answer

Option 1

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. 13 Apr 2023, Shift 2 · Q47Given below are two statements: Statement I : Out of microwaves, infrared rays and ultraviolet rays, ultraviolet rays are the most…EasyTwo statements

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.