Electric charges and field

• If E1and E2 are electric field at axial point and equatorial point of an electric dipole,then

a) E1.E2 > 0
b)E1.E2 = 0
c) E1.E2 < 0
d)E1+E2= 0
Ans=(c)...Pls explain

• @sri
The direction of the electric field due to point charge +q at point P will be away from itself whereas, The direction of the electric field due to point charge -q at point P will be towards itself.

Since the electric field due to charge +q is always larger than –q (as the distance of point P from +q is smaller than –q), So the resultant direction of electric field will be away from charge +q (i.e towards right).
The direction of electric field on the axial line is always same as the direction of dipole moment.

The direction of electric field on the equatorial line is always opposite to the direction of dipole moment.

when Eθis90E_{\theta} is 90 it is equatorial