Final answer:
The equation for the capacitance of the simplest parallel plate capacitor is C = ε₀A/d. Capacitance is directly proportional to the area of the plates and inversely proportional to the distance between them.
Step-by-step explanation:
The equation for the capacitance of the simplest parallel plate capacitor is C = ε₀A/d, where A is the area of one plate in square meters, d is the distance between the plates in meters, and ε₀ is the permittivity of free space. The permittivity of free space is a constant with a numerical value of 8.85 × 10-12 F/m. The equation shows that capacitance is directly proportional to the area of the plates and inversely proportional to the distance between them.