three charges -1 ,2 and 3 microcoulomb are placed at the corners a, b and c of an equivalent triangle of side 2m .calculate a) the electric potential b) the electric field at point x which is half away along BC​

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

see earlier

im sorry i dont know