A pair of parallel metal plates is maintained at a potential difference of $12\,\text{V}$. The separation between the plates is $1.0\,\text{mm}$. What is the electric field strength between the plates, and how much work is done on a charge of $+3.9\,\mu\text{C}$ when the charge is moved from the negative plate to the positive plate?
Physics 9702 · AS & A Level · Potential difference and power