Number of electrons in one coulomb of charge will be
$5.46 \times {10^{29}}$
$6.25 \times {10^{18}}$
$1.6 \times {10^{ + 19}}$
$9 \times {10^{11}}$
Mention types of methods of charging the body.
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.
Why the metal rods can’t be charged by holding them in hands ?
If a body is charged by rubbing it. Its weight
Write unit and value of fundamental electric charge.