# Electrostatic Potential

## Electrostatic Potential in a Uniform Field

### In an Electric field diagram, the Electric field strength is shown by the separation of the field lines. The closer together the field lines are, the stronger the Electric field is at that point :- ### In the above diagram, the field lines are closest together near to the point charges, giving a strong field at these points. ## Potential Difference

### The Potential Difference (V) between two points A and B (separated by distance d) is defined as the Work Done to move a unit positive charge between those points. ## Electrostatic Potential due to point charges

### Also previously, the Electric field strength could also be found using :- ### By combining the above formulae an expression for Electrostatic Potential ( V ) can be derived :- ### Integrating the above gives :-  ## Example 2 -

### What is the net Electrostatic Potential at the point x in the diagram below :- ### For charge A :- ### For charge B :- 