Two identical charged spheres suspended from a common point by two mass-less strings of length `l` are initially at a distance d ( `d ltlt l`) apart because of their mutual repulsion . The charge begins to leak from both the spheres at a constant rate. As a result the charge approach each other with a velocity `v`. Then as a function of distance `x` between them .

Options

A. `v oo x^(-1//2)`
B. `voox^(1//2)`
C. `voox`
D. `voox^(-1)`

Answer

A

Explanation

`F=(Kq^(2))/(x^(2))=mg tan theta, (dF)/(dq)=0`