Fg and Fe represents gravitational and electrostatic force respectively between electrons situated at a distance 10 cm. The ratio of Fg/Fe is of the order of

Gravitational force between electrons FG=G(me)2r2Electrostatics force between electrons Fe=k.e2r2FGFe=G(me)2k.e2=6.67×10−11×(9.1×10−31)29×109×(1.6×10−19)2=2.39×10−43