Two positive charges Q1 = 16 C and Q2 = 4 C, separated by a diameter of 3 m will produce force of ?(A) 40 N(B) 41.1 N(C) 42.3 N(D) 42.7 N

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

Need to find the time taken for the dipole to come back to eqm