There are three parallel metal plates with identical area. The gap between the top plate and the middle plate is $2.0\,\text{cm}$, while the spacing between the middle plate and the bottom plate is $1.0\,\text{cm}$. The top plate is maintained at a potential of $+500\,\text{V}$, the middle plate at $+200\,\text{V}$ and the bottom plate is earthed, as shown. What is the value of the ratio $\frac{\text{magnitude of force on an electron at X}}{\text{magnitude of force on an electron at Y}}$?
- A0.75
- B1.00
- C1.25
- D1.50