If x lies on the extended line OA, the required condition is
3
2
0
15
x
−x
=
−
Rationalised 2023-24
Electrostatic Potential
and Capacitance
53
 EXAMPLE 2 2
which gives
x  = 45 cm
Thus, electric potential is zero at 9 cm and 45 cm away from the
positive charge on the side of the negative charge Note that the
formula for potential used in the calculation required choosing
potential to be zero at infinity Example 2