Two point dipoles of dipole moment p and R       are at a distance x from each other and p is parallel to R .then the force between the dipoles is (a)k4pr/x^4 (b)k3pr/x^4 (c)k6pr/x^4   (d)k8pr/x^4

Dear Student ,

Field due to a dipole = kp/x3 Force = -ddx(R·E) =3kpRx4So here the correct option is (b) .Regards

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