This charge produces a potential in
space given by
V
rq
1
0
1
1
=41
πε
P
where r1P is the distance of a point P in space from the location of q1 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