) If x lies between O and A, we have
41
3 10
10
152 10
10
0
0
8
2
8
2
πε
××
−
−×
×
=




–
–
–
–
(
)
x
x
where x is in cm That is,
3
2
0
15
x
x
−
=
−
which gives x  =  9 cm 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