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- Thread starter Fatima Hasan
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gneill

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Yes, but the form of your second relevant equation in your last line of calculations is not. Fortunately you did the actual calculation correctly anyways## Homework Statement

View attachment 223345

## Homework Equations

##V= \frac {kq}{r}##

##V= \frac {U}{q}##

## The Attempt at a Solution

##V= \frac {kq}{r}## = 9*10^{9}*-5*10^{-9}/0.1= -450 V

##U= \frac {V}{q}## = -450 * -2*10^{-9}= 900nJ

Is my answer correct ?

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