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Two path balls carrying equal charges a...

Two path balls carrying equal charges are suspended from a common point by strings of equal length, the strings are rightly clamped at half the height. The equilibrium separation between the balls, now becomes :

A

`(1/sqrt(2))^(2)`

B

`(r/(root(3)(2)))`

C

`((2r)/sqrt(3))`

D

`((2r)/3)`

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The correct Answer is:
B
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