What would be net charge on it?

cbse
electricfield

#1

A metal sphere has a charge of - 6 µC. When 5 x ${{10}^{12}}$ electrons are removed from the sphere, what would be net charge on it?


#2

Here, ${{q}{1}}$ = -6 µ c
and ${{q}
{2}}$ = 5 x ${{10}^{12}}$ x ( 1.6 x ${{10}^{-19}}$)
= 8.0 x ${{10}^{-7}}$ c = 0.8 x ${{10}^{-6 }}$ = 0.8 µ c
Since, electrons are removed from the sphere, ${{q}{2}}$ is positive.
Therefore, net charge on the sphere,
q = ${{q}
{1}}$ +
${{q}_{2}}$ = (-6.0 + 8.0 ) = -5.2 µ c