Two identical charged spheres suspended form a common point by two massless strings of lengths l, are initially at a distance `d(d gt gt l)` apart because of their mutual repulsion. The charges brgin to leak from both the spheres at a constant rate. As a result, the spheres approach each other with a velocity v. Then v varies as a function of the distance x between the spheres, as

Options

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

Answer

C