# Capacitance

on . Posted in Electrical Engineering

Capacitance, abbreviated as C or CAP, is the ability of a system to store electrical charge.  The capacitance of a system depends on its physical characteristics and the arrangement of its components.  In other terms, capacitance quantifies how much charge a capacitor can store per unit of voltage.  A capacitor is a two terminal electronic component that consists of two conductive plates separated by an insulating material called a dielectric.  The larger the surface area of the plates and the smaller the separation between them, the higher the capacitance.

This equation illustrates that the current flowing into or out of a capacitor is proportional to the rate of change of voltage across the capacitor.  As a result, capacitors are often used in electronic circuits for various purposes, such as energy storage, smoothing voltage fluctuations, and filtering signals.  Capacitance plays a role in the behavior of many electrical systems and is a key parameter in the design and analysis of electronic circuits.

## Capacitance Formula

$$\large{ C = \frac{ Q }{ V } }$$
Symbol English Metric
$$\large{ C }$$ = capacitance $$\large{F}$$ $$\large{\frac{s^4-A^2}{kg-m^2}}$$
$$\large{ Q }$$ = electrical charge that is stored on the capacitor $$\large{C}$$ $$\large{A-s}$$
$$\large{ V }$$ = potential difference (the voltage between the capacitor's plates) $$\large{V}$$ $$\large{\frac{kg-m^2}{s^{3}-A}}$$

Tags: Electrical