Question

How much work is required to assemble eight identical point charges, each of magnitude q, at the corners of a cube of side s? Note: Assume a reference level of potential V = 0 at r = . (Use any variable or symbol stated above along with the following as necessary: ke.)

Answer 1

Lets suppose center of cube as origin.
All charges are equidistant from this point . 

 Distance = 0.5*s*√(3). 
Total work done = 8*(9*10^9)*q/(0.5*s*√(3) =
Total work  required to assemble eight identical point charges= (8.31*10^10)*q J