Physics (AS & A Level) · Oct / Nov 2021 · Paper 11 · Question 31

Three parallel metal plates of the same area are fixed with a separation of 2.0 cm between the top plate and the middle plate, and 1.0 cm between the middle plate and the bottom plate. The top plate is held at a potential of +500 V, the middle plate at +200 V and the bottom plate is earthed, as shown. What is the value of the ratio $\dfrac{\text{magnitude of force on an electron at X}}{\text{magnitude of force on an electron at Y}}$?

1. A0.75
2. B1.00
3. C1.25
4. D1.50

As printed in the paper