point charges Q1, Q2 respectively located at (4,0,3) & ( 2,0,1) If Q2 =4nc. Find Q1 such that 1)The E at (5,0,6) has no z component. 2)The force on a test charge (5,0,6) has no X- component.

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