# Two identical charged spheres suspended from a common point by two massless strings

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

(a) *v* α *x* ^{-1}

(b) *v* α *x*^{1/2 }*
*(c)

*v*α

*x*

(d)

*v*α

*x*

^{-1/2 }