JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 24 June 2022, Shift 2, Physics Q48

Question 48 of 90 in this shift, Physics question 18 of 30, Section A.

The light of two different frequencies whose photons have energies 3.8

eV

and 1.4

eV

respectively, illuminate a metallic surface whose work function is 0.6

eV

successively. The ratio of maximum speeds of emitted electrons for the two frequencies respectively will be :

(1)1 : 1
(2)2 : 1Official answer
(3)4 : 1
(4)1 : 4

Official answer

Option 2

NTA final key.

Chapter: Dual Nature of Radiation and Matter
Topic: Photoelectric Effect
Idea tested: Maximum Velocity Calculation

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 108 of the 174 JEE Main shifts held from 2017 to 2026.