From the definition of potential, work done in bringing charge q2 from
infinity to the point r2 is q2 times the potential at r2 due to q1:
work done on q2 = 
41
0
1
2
12
πε
q q
r
FIGURE 2 12 From the
potential to the field Rationalised 2023-24
Physics
56
where r12 is the distance between points 1 and 2 Since electrostatic force is conservative, this work gets
stored in the form of potential energy of the system