An electron of mass m and charge q is accelerated from rest in a uniform electric field of strength E. The velocity acquired by it as it travels a distance l is

Options

A. `[(2Eql)/m]^(1//2)`
B. `[(2Eq)/(ml)]^(1//2)`
C. `[(2Em)/(ql)]^(1//2)`
D. `[(Eq)/(ml)]^(1//2)`

Answer

A

Explanation

`v=sqrt((2qV)/m)(V=E.l)`
`therefore" "v=sqrt((2qEl)/m)`
`v=((2qEl)/m)^(1//2)`