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A stream of electrons from a heated fila...

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

A

`sqrt(2meV)`

B

`meV`

C

`2emV`

D

`sqrt(meV)`

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A
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