Capacitance
Capacitance
Capacitance (/kəˈpasɪtəns/) is a fundamental concept in electrostatics and electrical engineering that describes the ability of a conductive object to store an electric charge.
Etymology
The term "capacitance" was first used in the context of electricity in the mid-19th century. It is derived from the Latin word capacitas, which means "capacity" or "ability to hold", reflecting the ability of a conductor to hold a charge.
Definition
Capacitance is defined as the ratio of the change in an electric charge in a system to the corresponding change in its electric potential. It is usually denoted by the symbol C and is measured in farads (F), named after the English scientist Michael Faraday.
Related Terms
- Dielectric: A substance that is poor conductor of electricity, but an efficient supporter of electrostatic fields. When dielectrics are placed in an electric field, practically no current flows in them because, unlike metals, they have no loosely bound, or free, electrons that may drift through the material.
- Permittivity: The measure of a material's ability to store electrical energy in an electric field.
- Inductance: The property of an electrical conductor by which a change in current flowing through it induces an electromotive force in both the conductor itself and in any nearby conductors by mutual inductance.
See Also
External links
- Medical encyclopedia article on Capacitance
- Wikipedia's article - Capacitance
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