JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 6 April 2024, Shift 2, Physics Q47

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

When UV light of wavelength 300 nm is incident on the metal surface having work function 2.13 eV, electron emission takes place. The stopping potential is : (Given

hc=1240\ \mathrm{eV\,nm}

)

(1)4.1 V
(2)1.5 V
(3)2 VOfficial answer
(4)4 V

Official answer

Option 3

NTA final key.

Chapter: Dual Nature of Radiation and Matter
Topic: Photoelectric Effect
Idea tested: Stopping Potential

Same topic in other shifts

All Photoelectric Effect questions

2 Apr 2026, Shift 1 · Q42For a certain metal, when monochromatic light of wavelength $\lambda$ is incident, the stopping potential for photoelectrons is $3V_o$ .…MediumSingle correct
4 Apr 2026, Shift 1 · Q32The graph shows variation of stopping potential $V_o$ with the frequency $\nu$ of the incident radiation for three photosensitive metals…MediumDiagram basedHas a figure
5 Apr 2026, Shift 1 · Q41Light source having wavelength 331 nm is used to generate photo-electrons whose stopping potential is 0.2 V. The work function of the used…EasySingle correct
8 Apr 2026, Shift 2 · Q38A monochromatic source of light operating at 15 kW emits $2.5 \times 10^{22}$ photons/s. The region of an electromagnetic spectrum to…MediumSingle correct
8 Apr 2026, Shift 2 · Q43 $K_1$ and $K_2$ be the maximum kinetic energies of photoelectrons emitted from a surface of a given material for the light of wavelength…MediumSingle correct
2 Apr 2025, Shift 1 · Q44A monochromatic light is incident on a metallic plate having work function $\phi$ . An electron, emitted normally to the plate from a point…MediumSingle 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 42 of the 174 JEE Main shifts held from 2017 to 2026.