A potential difference of $12\,\text{V}$ is applied across two parallel metal plates. The separation of the plates is $1.0\,\text{mm}$. Find the electric field strength between the plates and the work done on a charge of $+3.9\,\mu\text{C}$ when it is moved from the negative plate to the positive plate.
- Aelectric field strength $12\,\text{N C}^{-1}$; work done $4.7 \times 10^{-5}\,\text{J}$
- Belectric field strength $12\,\text{N C}^{-1}$; work done $47\,\text{J}$
- Celectric field strength $12000\,\text{N C}^{-1}$; work done $4.7 \times 10^{-5}\,\text{J}$
- Delectric field strength $12000\,\text{N C}^{-1}$; work done $47\,\text{J}$