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Physics-

General

Easy

Question

A charge Q is shifted from the origin to a point P(a, a). the work done by the electrical force is

$\frac{K Q q}{a} (1 - \frac{1}{\sqrt{5}})$
$\frac{K Q q (\sqrt{5} - 1)}{a}$
$- \frac{K Q q}{a} (1 - \frac{1}{\sqrt{5}})$
$\frac{- K Q q}{a} (\sqrt{5} - 1)$

The correct answer is: $fraction numerator K Q q over denominator a end fraction open parentheses 1 minus fraction numerator 1 over denominator square root of 5 end fraction close parentheses$

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