The diagram illustrates two parallel metal plates P and Q, which are spaced $5.0\,\text{mm}$ apart. The potential difference between the plates is $700\,\text{V}$. Plate Q is earthed. What are the magnitude and direction of the electric field at point R?
- A$1.4 \times 10^{2}\,\text{N C}^{-1}$ from P towards Q
- B$1.4 \times 10^{2}\,\text{N C}^{-1}$ from Q towards P
- C$1.4 \times 10^{5}\,\text{N C}^{-1}$ from P towards Q
- D$1.4 \times 10^{5}\,\text{N C}^{-1}$ from Q towards P