For capacitance of blood vessels, see Compliance (physiology).
Common symbols
C
SI unit
farad
Other units
μF, nF, pF
In SI base units
F = A2 s4 kg−1 m−2
Derivations from other quantities
C = charge / voltage
Dimension
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Capacitance is the capability of a material object or device to store electric charge. It is measured by the 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.[1]: 237–238 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 is a function only of the geometry; the opposing surface area of the conductors and the distance between them, 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.
The SI unit of capacitance is the farad (symbol: F), named after the English physicist Michael Faraday. A 1 farad capacitor, when charged with 1 coulomb of electrical charge, has a potential difference of 1 volt between its plates.[2] The reciprocal of capacitance is called elastance.
^Harrington, Roger F. (2003). Introduction to Electromagnetic Engineering (1st ed.). Dover Publications. p. 43. ISBN 0-486-43241-6.
notions of capacitance: self capacitance and mutual capacitance.: 237–238 An object that can be electrically charged exhibits self capacitance, for which...
known as projected capacitance. Projected capacitance uses a simple form of artificial intelligence to measure the changes in capacitance caused by one or...
Differential capacitance in physics, electronics, and electrochemistry is a measure of the voltage-dependent capacitance of a nonlinear capacitor, such...
value of capacitance, but adjustable capacitors are frequently used in tuned circuits. Different types are used depending on required capacitance, working...
Parasitic capacitance or stray capacitance is the unavoidable and usually unwanted capacitance that exists between the parts of an electronic component...
variable capacitance diode, variable reactance diode or tuning diode is a type of diode designed to exploit the voltage-dependent capacitance of a reverse-biased...
two terminals. The utility of a capacitor depends on its capacitance. While some capacitance exists between any two electrical conductors in proximity...
also called an ultracapacitor, is a high-capacity capacitor, with a capacitance value much higher than solid-state capacitors but with lower voltage...
A variable capacitor is a capacitor whose capacitance may be intentionally and repeatedly changed mechanically or electronically. Variable capacitors...
only small capacitance values could be realized. The expanding market of radios in the 1930s and 1940s create a demand for higher capacitance values but...
Capacitance sensors (or Dielectric sensors) use capacitance to measure the dielectric permittivity of a surrounding medium. The configuration is like...
increase in the equivalent input capacitance of an inverting voltage amplifier due to amplification of the effect of capacitance between the amplifier's input...
A capacitance meter is a piece of electronic test equipment used to measure capacitance, mainly of discrete capacitors. Depending on the sophistication...
Quantum capacitance, also known as chemical capacitance and electrochemical capacitance C μ ¯ {\displaystyle C_{\bar {\mu }}} , was first reported experimentally...
Body capacitance is the physical property of a human body to act as a capacitor. Like any other electrically conductive object, a human body can store...
The Capacitance Electronic Disc (CED) is an analog video disc playback system developed by Radio Corporation of America (RCA), in which video and audio...
resonant circuit with externally connected parallel capacitance. Any small additional capacitance in parallel with the crystal pulls the frequency lower...
The farad (symbol: F) is the unit of electrical capacitance, the ability of a body to store an electrical charge, in the International System of Units...
detect changes in capacitance. When a person touches it, their body increases the capacitance and triggers the switch. Unlike self-capacitance, mutual capacitive...
Diffusion Capacitance is the capacitance that happens due to transport of charge carriers between two terminals of a device, for example, the diffusion...
A capacitance multiplier is designed to make a capacitor function like a much larger capacitor. This can be achieved in at least two ways. An active circuit...
In electrical engineering, capacitive sensing (sometimes capacitance sensing) is a technology, based on capacitive coupling, that can detect and measure...
Capacitance hat may refer to: Capacitance hat, horizontal wires at the top of a T-antenna Capacitance hat, a network of rounded wires at the top of a...
static double-layer capacitance. Pseudocapacitance and double-layer capacitance both contribute inseparably to the total capacitance value. The amount of...
pieces of insulated wire together. The capacitance may be varied by loosening or tightening the winding. The capacitance can also be reduced by shortening...
type of electronic test equipment used to measure the inductance (L), capacitance (C), and resistance (R) of an electronic component. In the simpler versions...
much higher capacitance-voltage (CV) product per unit volume than ceramic capacitors or film capacitors, and so can have large capacitance values. There...
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