The work done in placing a charge of 8 x 10^-18 coulomb on a condenser of capacity 100 mirco-farad is

(a) 16 x 10^-32 joule

(b) 3.1 x 10-²⁶ joule

(c) 4 x 10^-10 joule

(d) 32 x 10^-32 joule

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