capacitance
Sign in to saveCapacitance is the ability of an object to store electric charge. It is measured by the change in charge in response to a difference in electric potential, expressed as the ratio of those quantities. Commonly recognized are two closely related notions of capacitance: self capacitance and mutual capacitance. An object that can be electrically charged exhibits self capacitance, for which the electric potential is measured between the object and ground. Mutual capacitance is measured between two components, and is particularly important in the operation of the capacitor, an elementary linear elec
AI overview
Capacitance is the ability of an object or pair of objects to store electric charge, measured by how much charge builds up when an electrical voltage is applied. It matters because it's a fundamental property that explains how capacitors—common components in electronics—work and how electrical systems store and manage energy.
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Key facts
- Physical quantity.unit
- farad
- Physical quantity.otherunits
- μF, nF, pF
- Physical quantity.baseunits
- F = A2 s4 kg−1 m−2
- Physical quantity.dimension
- wikidata
- Physical quantity.derivations
- C = charge / voltage
via Wikipedia infobox
Article
17 sectionsContents
- Self capacitance
- Mutual capacitance
- Capacitance matrix
- Capacitors
- Stray capacitance
- Capacitance of conductors with simple shapes
- Energy storage
- Nanoscale systems
- Single-electron devices
- Few-electron devices
- Capacitance in electronic and semiconductor devices
- Negative capacitance in semiconductor devices
- Measuring capacitance
- See also
- References
- Further reading
- External links
Capacitance is the ability of an object to store electric charge. It is measured by the change in charge in response to a difference in electric potential, expressed as the ratio of those quantities. Commonly recognized are two closely related notions of capacitance: self capacitance and mutual capacitance. An object that can be electrically charged exhibits self capacitance, for which the electric potential is measured between the object and ground. Mutual capacitance is measured between two components, and is particularly important in the operation of the capacitor, an elementary linear electronic component designed to add capacitance to an electric circuit.
The capacitance between two conductors depends on the opposing surface area of the conductors, the distance between those conductors, and the permittivity of any dielectric material between them. For many dielectric materials, the permittivity, and thus the capacitance, is independent of the potential difference between the conductors and the total charge on them.