A free particle having one electronic charge with initial kinetic energy 9 eV and de Broglie wavelength 1 mm enters a region of V0 potential difference such that new de Broglie wavelength is now 1.5 mm. Then eV0 is
A free particle having one electronic charge with initial kinetic energy 9 eV and de Broglie wavelength 1 mm enters a region of V0 potential difference such that new de Broglie wavelength is now 1.5 mm. Then eV0 is
Option 1 -
5 eV
Option 2 -
6 eV
Option 3 -
13.5 eV
Option 4 -
15 eV
Asked by Shiksha User
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1 Answer
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Correct Option - 1
Detailed Solution:λ? = h/√2mE? = λ? = h/√2mE?
=> E? = (4/9)E? = 4eV
E? = E? - eV? => V? = 5V
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