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…

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 (where λ is wavelength associated with electron wave) is given by

Accepted Answer

Correct answer: C. (c) Kinetic energy = eV= 12 mu^2 u= 2 eVm … . . (i ) Here, u is the velocity of the electron. The de broglie wavelength is = h mu. h = mu … . . . ( ii ) Substitute equation (i) in equation (ii) h =m 2 eVm= 2 meV

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

Solution

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