The diagram shows a uniformly charged hemisphere of radius R. It has volume charge density `rho`. If the electric field at a point 2R distance above its centre is E then what is the electric field at the point which is 2R below its centre?
Options:
(a) `(rhoR)/(6epsilon_0)+E`
(b) `(rhoR)/(12epsilon_0)-E`
(c) `(-rhoR)/(6epsilon_0)+E`
(d) `(rhoR)/(24epsilon_0)+E`