Three identical spheres each of radius a and mass m are placed such that their centers lie on the vertices of an equilateral triangle of side length 3a. The spheres are non conducting and each one carries a charge Q uniformly distributed over its surface. All the three spheres are simultaneously released and after releasing they move under the influence of their mutual electrostatic forces only. Based on this information, answer the following questions :
The total electrostatic potential energy stored in the system at the time of releasing is :

Options

A. Zero
B. `(KQ^(2))/(2ab)`
C. `(aKQ^(2))/(2ab)`
D. Dependent on the mass of each sphere

Answer

A

Explanation

At time of release speed of charges will be zero.
`implies`At that instant, rate of electrostatics potential energy decrease = 0