JEE Main 2015PhysicsDual Nature of MatterEasyMCQ

JEE Main 2015 — Dual Nature of Matter Question with Solution

JEE Main 2015 (10 Apr Online)

Question

De-Broglie wavelength of an electron accelerated by a voltage of 50 V is close to e=1.6×10-19 C, me=9.1×10-31 kg,  h=6.6×10-34 J s

Choose an option

Show full solutionCorrect option: C
Correct answer
C1.7 Å

Step-by-step explanation

De-Broglie wavelength λ in given by  

λ=hmv=h2meV

and for electron λ=12.27 A°V

=12.27 A°50

=1.7 A°

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About this question

This is a previous-year question from JEE Main 2015, 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.