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 4× in all

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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.