JEE Main 2026 — Dual Nature of Matter Question with Solution
JEE Main 2026 (21 January Shift 2)
Question
A particle having electric charge and mass is accelerated by applying an electric potential of 1.21 V. Wavelength of the matter wave associated with the particle is . The value of is - (Take Planck's constant )
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Show full solutionCorrect answer: 10
Correct answer
10
Step-by-step explanation
The de Broglie wavelength is where is found from energy conservation.
From : m/s.
Therefore: m = m.
Thus .
From : m/s.
Therefore: m = m.
Thus .
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This is a previous-year question from JEE Main 2026, covering the Dual Nature of Matter chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.