An electron accelerated under a potential difference V volt has a certain wavelength `lamda`. Mass of the proton is 2000 times the mass of the electron. If the proton has to have the same wavelength `lamda`, then it will have to be accelerated under a potential difference of:

Options

A. V volt
B. 2000 V volt
C. `(V)/(2000)` volt
D. `sqrt(2000)` V volt.

Answer

C

Explanation

`lambda=(h)/(sqrt(2meV))`, here `mv=cost`
`:.200xxV.=V xx 1 rArr V.=(V)/(2000)` Volt