JEE Main 2025 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 3 April 2025, Shift 1, Physics Q43

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

The work function of a metal is 3 eV. The color of the visible light that is required to cause emission of photoelectrons is

(1)Yellow
(2)Green
(3)Red
(4)BlueOfficial answer

Official answer

Option 4

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

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
31 Jan 2024, Shift 2 · Q46In a photoelectric effect experiment a light of frequency 1.5 times the threshold frequency is made to fall on the surface of…EasySingle correct
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.