Learn

Friday, 9 October

JEE Main 2025 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 8 April 2025, Shift 2, Physics Q50

Question 50 of 75 in this shift, Physics question 25 of 25, Section B.

An electron is released from rest near an infinite non-conducting sheet of uniform charge density '−σ-\sigma' .The rate of change of de-Broglie wave length associated with the electron varies inversely as nthn^{th} power of time. The numerical value of n is __________.

Official answer

2

NTA final key.

Chapter
Dual Nature of Radiation and Matter
Topic
Matter Waves
Idea tested
Time Rate of Change of Wavelength

Same idea in other shifts

Asked 2× in all
  1. 9 Jan 2020, Shift 2 · Q18An electron of mass mm and magnitude of charge ∣e∣|e| initially at rest gets accelerated by a constant electric field EE. The rate of…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.