A parallel-plate capacitor is made using a sheet of dielectric material between, and in contact with, two plates of fixed area.
The properties of four different sheets of dielectric material are shown in the table:
| Sheet | Relative permittivity | Thickness / mm |
|---|---|---|
| P | 3.0 | 0.50 |
| Q | 4.0 | 1.20 |
| R | 5.0 | 0.80 |
| S | 6.0 | 1.50 |
Which sheet will produce the maximum capacitance?