JEE Main 2023 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 12 April 2023, Shift 1, Physics Q47

Question 47 of 90 in this shift, Physics question 17 of 30, Section A.

A proton and an

\alpha

-particle are accelerated from rest by 2 V and 4 V potentials, respectively. The ratio of their de-Broglie wavelength is :

(1) $2:1$
(2) $4:1$ Official answer
(3) $8:1$
(4) $16:1$

Official answer

Option 2

NTA final key.

Chapter: Dual Nature of Radiation and Matter
Topic: Matter Waves
Idea tested: Wavelength from Accelerating Potential

Same idea in other shifts

Asked 5× in all

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30 Jul 2022, Shift 2 · Q19The de Broglie wavelength associated with an electron, accelerated through a potential difference of 15056 V, is:EasySingle correct
22 Jul 2021, Shift 2 · Q10An electron of mass $\mathrm{m_e}$ and a proton of mass $\mathrm{m_p}$ are accelerated through the same potential difference. The ratio of…EasySingle 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.