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An electron of mass m and charge q is ac...

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

A

`[(2Eql)/(m)]^(-1//2)`

B

`[(2Eq)/(ml)]^(1//2)`

C

`[(2Em)/(ql)]^(1//2)`

D

`[(Eq)/(ml)]^(1//2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`1/2 mv^2 =qV=qEl`
`v = [(2qEl)/m]^(1//2)`
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