In a vacuum, two parallel plates R and S are separated by $2\,\text{mm}$. An electron, carrying charge $-1.6 \times 10^{-19}\,\text{C}$, travels in a straight line through the electric field between the plates. The graph illustrates how the electron’s potential energy changes with its distance from plate R. Which conclusion is incorrect?
- AThe electric field between R and S is uniform.
- BThe electric field strength is $3000\,\text{N C}^{-1}$.
- CThe force on the electron is constant.
- DThe magnitude of the potential difference between R and S is $3\,\text{V}$.