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If an electron moves from rest from a po...

If an electron moves from rest from a point at which potential is `50` volt to another point at which potential is `70` volt, then its kinetic energy in the final state will be

A

`3.2 xx 10^(-10) J`

B

`3.2 xx 10^(-18) J`

C

`1 N`

D

1 dyne

Text Solution

Verified by Experts

The correct Answer is:
B
`K.E. = q_(0) (V_(A) - V_(B))`
`= 1.6 xx 10^(-19) (70 - 50) = 3.2 xx 10^(-18) J`
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