The work done in moving a charge of $20 \ C$ from point $A$ to point $B$ is $2 \ J$. What is the potential difference between the two points (in $V$)?

Prove that electrostatic forces are conservative in nature and define electrostatic potential energy.

When a positive $q$ charge is taken from a lower potential point to a higher potential point,its potential energy will

$A$ Van de Graaff generator has a spherical metal shell as an electrode which is at a potential $15 \times 10^6 \,V$. If the dielectric strength of the surrounding medium is $5 \times 10^7 \,V/m$, then the diameter of the shell is (in $\,cm$)

The given graph shows the variation (with distance $r$ from the centre) of:

Explain electrostatic potential energy difference and give the noteworthy comments on it.