question_answer

The work done required to put the four charges together at the comers of a square of side a, as shown in the figure is-

A) \[\frac{1}{4\pi {{\varepsilon }_{0}}}\,\,\frac{{{q}^{2}}}{a}\]                

B) \[-\frac{2.6{{q}^{2}}}{4\pi {{\varepsilon }_{0}}}\,\,\frac{{{q}^{2}}}{a}\]

C) \[+\frac{2.6}{4\pi {{\varepsilon }_{0}}}\,\,\frac{{{q}^{2}}}{a}\]                      

D) none of these