Similarly, the potential V2 at P due to q2 and
V3 due to q3 are given by
2
2
0
2P
1
4
q
V
εr
=
π
, 
3
3
0
3P
1
4
q
V
εr
=
π
where r2P and r3P are the distances of P from
charges q2 and q3, respectively; and so on for the
potential due to other charges By the
superposition principle, the potential V at P due
to the total charge configuration is the algebraic
sum of the potentials due to the individual
charges
V = V1 + V2 + + Vn
(2 17)
FIGURE 2