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The mass of an electron is m, its charge...

The mass of an electron is m, its charge is e and it is accelerated from rest through a potential difference, V. The velocity of electron can be calculated by formula:

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The correct Answer is:
C
`K.E.=eV" [V : Potential difference]"`
`(1)/(2)mv^(2)=ev" (e : charge] "v=sqrt((2eV)/(m))`
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