Capacitance is based on what?

Capacitance is based on what?

• A. The physical properties of the capacitor, such as conductor size and distance apart
• B. The color of the casing
• C. The ambient humidity
• D. The manufacturing date

Answer: (D)

Capacitance is determined by how much electric field the plates can store for a given voltage, which depends on geometry and the material between the plates. For a simple parallel-plate capacitor, C = ε0 εr A / d, where A is the plate area, d is the separation between plates, and εr is the dielectric constant of the material between them. So, the physical properties of the capacitor—the size of the plates (conductor area) and how far apart they are—set the capacitance. The color of the casing or ambient humidity don’t define the intrinsic capacitance, and the manufacturing date doesn’t change the fundamental storage capability (though real devices can have small aging or leakage effects).

Capacitance is determined by how much electric field the plates can store for a given voltage, which depends on geometry and the material between the plates. For a simple parallel-plate capacitor, C = ε0 εr A / d, where A is the plate area, d is the separation between plates, and εr is the dielectric constant of the material between them. So, the physical properties of the capacitor—the size of the plates (conductor area) and how far apart they are—set the capacitance. The color of the casing or ambient humidity don’t define the intrinsic capacitance, and the manufacturing date doesn’t change the fundamental storage capability (though real devices can have small aging or leakage effects).