JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyConceptual

JEE Main 31 January 2024, Shift 2, Physics Q46

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

In a photoelectric effect experiment a light of frequency 1.5 times the threshold frequency is made to fall on the surface of photosensitive material. Now if the frequency is halved and intensity is doubled, the number of photo electrons emitted will be:

(1)ZeroOfficial answer
(2)halved
(3)doubled
(4)quadrupled

Official answer

Option 1

NTA final key.

Chapter: Dual Nature of Radiation and Matter
Topic: Photoelectric Effect
Idea tested: Work Function and Threshold

Same idea in other shifts

Asked 4× in all

3 Apr 2025, Shift 1 · Q43The work function of a metal is 3 eV. The color of the visible light that is required to cause emission of photoelectrons isEasySingle correct
7 Apr 2025, Shift 1 · Q52Which of the following statements are correct, if the threshold frequency of caesium is $5.16 \times 10^{14}$ Hz? A. When Cs is placed…MediumOtherHas a figure
29 Jun 2022, Shift 1 · Q37Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The photoelectric…EasyAssertion–reason

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.