A short electrie dipole of dipole moment el is
placed at origin. If electric field at point Q(1. y) due
to dipole is purely along yaxis. Then value of y
would be
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Answer:
E
2
=
4π∈
o
r
3
2pcosθ
E
1
=
4π∈
o
r
3
psinθ
tanα=
E
2
E
1
=
2
tanθ
As tanθ=
1
2
=
2
tanα=
2
2
=
2
1
Angle made by x− axis with E
net
=α+θ
tan(α+θ)=
1−tanαtanθ
tanα+tanθ
As tanα.tanθ=
2
1
2
=1
tan(αθ)=∞
α+θ=90
o
Explanation:
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