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Two fixed charges -2 Q and Q are locatt...

Two fixed charges `-2 Q ` and `Q` are locatted at the points with coordinates ( -3 a, 0) and (+3 a, 0) prespectively in the ` X- Y` plane .
The expression for the potential ` V (x)` at a general point on the x-axis is given by .

A

` V(x) = 1/(4 pi varepsilon_0) [Q/(3a -x) - (2Q)/((3a+x))] for 0 lt xlt 3 a`

B

` V(x) = 1/(4 pi varepsilon_0) [2Q/(3a -x) - (2Q)/((3a+x))] for 0 lt xlt 3 a`

C

` V(x) = 1/(4 pi varepsilon_0) [Q/(3a -x) - (2Q)/((3a+x))] for 0 lt xlt 3 a`

D

` V(x) = 1/(4 pi varepsilon_0) [Q/(3a -x) - (2Q)/((3a+x))] for 0 lt xlt 3 a`

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The correct Answer is:
A
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