The diagram illustrates two metal plates P and Q. A potential difference of $700\,\text{V}$ exists across the plates. Plate Q is earthed. What are the magnitude and the 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