Justify that the electrostatic potential is constant throughout the volume of a changed conductor and has the same value on its surface as inside it.

Is it possible to create an electric field in which all the lines of force are parallel lines and whose density increases gradually in a direction perpendicular to the lines of force, as shown in Figure below?

Figure below shows lines of constant potential in a region in which electric field exists. The values of the potential are indicated. Out of the points $A, B$ and $C$, which will be of greatest electric field strength? Give reason.

The equipotential surfaces of certain field are shown in figure below. It is given that $V_1>V_2$. Draw the corresponding lines of force for this pattern. Also state the region in which the electric field intensity is highest.

A test charge $\text{'}q\text{'}$ is moved without acceleration from $A$ to $C$ along the path from $A$ to $B$ and then from $B$ to $C$ in electric field $E$ as shown in the figure below. Calculate the potential difference between $A$ and $C$.

A test charge $\text{'}q\text{'}$ is moved without acceleration from $A$ to $C$ along the path from $A$ to $B$ and then from $B$ to $C$ in electric field $E$ as shown in the figure below. At which point (of the two) is the electric potential more and why?

Find the P.E. associated with a charge$\text{'}q\text{'}$ if it were present at the point $P$ with respect to the 'set-up' of two charged spheres, arranged as shown in figure below. Here $O$ is the mid-point of the line $O_1{O}_2$.