A metallic solid sphere is placed in a uniform electric field. The lines of force follow the path(s) shown in figure as
$1$
$2$
$3$
$4$
Using thomson's model of the atom, consider an atom consisting of two electrons, each of charge $-e$, embeded in a sphere of charge $+2e$ and radius $R$. In equilibrium each electron is at a distance $d$ from the centre of the atom. What is the equilibrium separation between electrons
When electric flux is said to be positive, negative or zero ?
Each of two large conducting parallel plates has one sided surface area $A$. If one of the plates is given a charge $Q$ whereas the other is neutral, then the electric field at a point in between the plates is given by
Write $SI$ unit of electric flux.
Gauss’s law is true only if force due to a charge varies as