When ${10^{19}}$ electrons are removed from a neutral metal plate, the electric charge on it is
$-1.6 \,C$
$+ 1.6 \,C$
$10^{+19}\, C$
$10^{-19} \,C$
A small sphere of radius $r_{1}$ and charge $q_{1}$ is enclosed by a spherical shell of radius $r_{2}$ and charge $q_{2} .$ Show that if $q_{1}$ is positive, charge will necessarily flow from the sphere to the shell (when the two are connected by a wire) no matter what the charge $q_{2}$ on the shell is.
What is earthing or grounding in household electrical circuit ?
Give difference between charge and mass.
What is Greek meaning of electrics ?