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 :

Engineering

Chemistry

Photoelectric Effect and Plank Theory

Dual Behaviour and de Broglie Hypothesis

Question

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 :

$\sqrt{meV}$

meV

2meV

$\sqrt{2 meV}$

LiveFree JEE Main Previous Year Online Papers Live Free JEE Advance Previous Year Online Papers

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

$λ = \frac{h}{mv}$

$= \frac{h}{\sqrt{2 m (KE)}}$

$∴ \frac{h}{λ} = \sqrt{2 meV}$