JEE Main 2022 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 24 June 2022, Shift 1, Physics Q56

Question 56 of 90 in this shift, Physics question 26 of 30, Section B.

When light of frequency twice the threshold frequency is incident on the metal plate, the maximum velocity of emitted electron is

v_1

. When the frequency of incident radiation is increased to five times the threshold value, the maximum velocity of emitted electron becomes

v_2

. If

v_2=x\,v_1

, the value of

x

will be ______.

Official answer

NTA final key (2022 Session 1).

Chapter: Dual Nature of Radiation and Matter
Topic: Photoelectric Effect
Idea tested: Einstein's Photoelectric Equation

Same idea in other shifts

Asked 14× in all

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6 Apr 2024, Shift 1 · Q47In photoelectric experiment energy of 2.48 eV irradiates a photo sensitive material. The stopping potential was measured to be 0.5 V. Work…EasySingle correct
9 Apr 2024, Shift 2 · Q47UV light of $4.13$ eV is incident on a photosensitive metal surface having work function $3.13$ eV. The maximum kinetic energy of ejected…EasySingle correct
28 Jul 2022, Shift 2 · Q17Two streams of photons, possessing energies equal to five and ten times the work function of metal are incident on the metal surface…EasySingle correct
29 Jul 2022, Shift 1 · Q46The kinetic energy of emitted electron is E when the light incident on the metal has wavelength $\lambda$ . To double the kinetic energy,…MediumSingle correct
28 Jun 2022, Shift 2 · Q47Let $K_1$ and $K_2$ be the maximum kinetic energies of photo-electrons emitted when two monochromatic beams of wavelength $\lambda_1$ and…MediumSingle correct
29 Jun 2022, Shift 2 · Q36The electric field at a point associated with a light wave is given by…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.