A parallel plate capacitor has two sections; the areas of the plates are A1 and a₂. What is the capacitance?
a) C = ε(A1 + a₂)
b) C = ε(A1 - a₂)
c) C = εA1a₂/(A1 + a₂)
d) C = εA1a₂/(A1 - a₂)