1. Tardigrade
  2. Question
  3. Chemistry
  4. A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference V esu. If e and m are charge and mass of an electron, respectively, then the value of h/ λ (where λ is wavelength associated with electron wave) is given by :

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference $V$ esu. If $e$ and $m$ are charge and mass of an electron, respectively, then the value of $h/ \lambda$ (where $\lambda$ is wavelength associated with electron wave) is given by :

JEE MainJEE Main 2016Structure of Atom

Solution:

$\lambda = \frac{h}{P} = \frac{h}{\sqrt{2mE}} = \frac{h}{\sqrt{2me\,V}} $

$\Rightarrow \frac{h}{\lambda} = \sqrt{2me\,V} $