A 3.1-cm diameter parallel-plate capacitor has a 2.2 mm spacing. The electric field strength inside the capacitor is 1.0 × 10⁵ V/m. What is the capacitance?
a) 1.3 × 10⁻¹⁰ F
b) 2.6 × 10⁻¹⁰ F
c) 5.2 × 10⁻¹⁰ F
d) 1.0 × 10⁻⁵ F