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Dual Nature of Radiation and Matter question

2020 · Q156
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Dual Nature of Radiation and Matter question

2020 · Q156

NEETPhysicsDual Nature of Radiation and MatterMCQ+4 / −1
An electron is accelerated from rest through a potential difference of V volt. If the de-Broglie wavelength of the electron is 1.227 ×\times× 10-2 nm, the potential difference is :
  1. A
    102 V
  2. B
    103 V
  3. C
    104 V
  4. D
    10 V
View written solutionFree

Correct answer: C

The de-Broglie wavelength and the accelerated potential is related as follows :

\lambda = {{12.27} \over {\sqrt V }}$$$A^\circ $ <br><br>\sqrt V = {{12.27 \times {{10}^{ - 10}}} \over {1.227 \times {{10}^{ - 11}}}} = {10^2}$$

V=104V = {10^4}V=104 volts

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