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A particle of mass m and charge q is pla...

A particle of mass m and charge q is placed at rest in a uniform electric field E and then released, the kinetic energy attained by the particle after moving a distance y will be

A

`(qQ)/(4 pi epsilon_0D)`

B

`(qQ)/(4 pi epsilon_0ED)`

C

`(qQ)/(2 pi epsilon_0D^2)`

D

`(qQ)/(4 pi epsilon_0D^2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Conservation of energy
`(qE)D=1/(4 pi epsilon_0).(qQ)/(r_0) implies r_0 =Q/(4piepsilon_0ED)`
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