33 × 105  N C–1 along BA As in (a), we can expect to get approximately the same result by
directly using the formula for dipole field at a point on the normal to
the axis of the dipole:
Rationalised 2023-24
Electric Charges
and Fields
27
 EXAMPLE 1 9
E
p
r
= 4
3
π
0ε
(r/a >> 1)
8
12
2
–1
–2
5 10
Cm
4
(8 854 10
C N
m
)
−
−
×
=
π
×
3
6
3
1
(15)
10
m
−
×
×
=  1