Two point dipoles of dipole moment p and Rare 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

Electrostatics question based on earthing of spherical shell

an object has a charge of 2c and gains 10^19 electrons. the net chaarge on the object becomes??

A wire with a linear charge density lambda forms a quarter of a cjrclenof radius R and is placed asa shown in thefigure with its centre of curvature at the origin O the electric field at O will be

Find the value of q so that system remains in equilibrium.. figure attached below

Find the value of q so that system remains in equilibrium