CAPE Physics Unit 2 · 2014 · Paper 1 · Question Q11

Figure 1 shows a parallel plate capacitor with the space between the plates filled with air. Figure 2 shows the same capacitor with the space between the plates filled with a dielectric whose permittivity is twice that of air. What is the ratio of C_2 : C_1?

1. (A)1 : 1
2. (B)1 : 3
3. (C)2 : 1
4. (D)3 : 2

This question uses a figure or table from the paper — you'll see it when you practise.