Two spheres $A$ and $B$ of radius $4\,cm$ and $6\,cm$ are given charges of $80\,\mu c$ and $40\,\mu c$ respectively. If they are connected by a fine wire, the amount of charge flowing from one to the other is
$20\,\mu C$ from $A$ to $B$
$16\,\mu C$ from $A$ to $B$
$32\,\mu C$ from $B$ to $A$
$32\,\mu C$ from $A$ to $B$
Why Coulomb’s law is associated with Newton’s $3^{rd}$ law ?
When ${10^{14}}$ electrons are removed from a neutral metal sphere, the charge on the sphere becomes......$\mu C$
Force between $A$ and $B$ is $F$. If $75\%$ charge of $A$ is transferred to $B$ then force between $A$ and $B$ is
A charge $q$ is placed at the centre of the line joining two equal charges $Q$. The system of the three charges will be in equilibrium, if $q$ is equal to