JEE Main 2022 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 26 June 2022, Shift 2, Physics Q60

Question 60 of 90 in this shift, Physics question 30 of 30, Section B.

The stopping potential for photoelectrons emitted from a surface illuminated by light of wavelength 6630 Å is 0.42 V. If the threshold frequency is

x \times 10^{13}

/s , where

x

is ________ (nearest integer). (Given, speed light =

3 \times 10^{8}

m/s ,Planck's constant =

6.63 \times 10^{-34}\ Js

)

Official answer

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

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
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
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.