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 10× 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
30 Jan 2024, Shift 1 · Q46The work function of a substance is 3.0 eV. The longest wavelength of light that can cause the emission of photoelectrons from this…EasySingle correct
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
13 Apr 2023, Shift 1 · Q45The difference between threshold wavelengths for two metal surfaces A and B having work function $\phi_A = 9\ eV$ and…EasySingle correct
25 Jun 2022, Shift 2 · Q61The minimum energy that must be possessed by photons in order to produce the photoelectric effect with platinum metal is: [Given: The…EasySingle correct
26 Jun 2022, Shift 2 · Q47A metal surface is illuminated by a radiation of wavelength 4500 Å. The ejected photo-electron enters a constant magnetic field of 2 mT…MediumSingle correct
26 Jun 2022, Shift 2 · Q60The stopping potential for photoelectrons emitted from a surface illuminated by light of wavelength 6630 Å is 0.42 V. If the threshold…MediumNumerical value
28 Jun 2022, Shift 1 · Q82If the work function of a metal is $6.63 \times 10^{-19}$ J, the maximum wavelength of the photon required to remove a photoelectron from…EasyNumerical value

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.