Ad
related to: cable capacitance calculator- Meet the Fire TV Family
See our devices for streaming your
favorite content and live TV.
- Explore Amazon Smart Home
Shop for smart home devices that
work with Alexa. See our guide too.
- Meet the Fire TV Family
Search results
Results From The WOW.Com Content Network
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.
As a result, device admittance is frequency-dependent, and the simple electrostatic formula for capacitance, = , is not applicable. A more general definition of capacitance, encompassing electrostatic formula, is: [ 6 ]
Figure. 1: Cable theory's simplified view of a neuronal fiber. In neuroscience, classical cable theory uses mathematical models to calculate the electric current (and accompanying voltage) along passive [a] neurites, particularly the dendrites that receive synaptic inputs at different sites and times.
In all inductors, the parasitic capacitance will resonate with the inductance at some high frequency to make the inductor self-resonant; this is called the self-resonant frequency. Above this frequency, the inductor actually has capacitive reactance. The capacitance of the load circuit attached to the output of op amps can reduce their bandwidth.
The phase velocity at which electrical signals travel along a transmission line or other cable depends on the construction of the line. Therefore, the wavelength corresponding to a given frequency varies in different types of lines, thus at a given frequency different conductors of the same physical length can have different electrical lengths.
At a distance x into the line, there is current phasor I(x) traveling through each wire, and there is a voltage difference phasor V(x) between the wires (bottom voltage minus top voltage). If Z 0 {\displaystyle Z_{0}} is the characteristic impedance of the line, then V ( x ) / I ( x ) = Z 0 {\displaystyle V(x)/I(x)=Z_{0}} for a wave moving ...
The capacitance between the two conductors is represented by a shunt capacitor (farads per unit length). The conductance of the dielectric material separating the two conductors is represented by a shunt resistor between the signal wire and the return wire (siemens per unit length).
The signal delay of a wire or other circuit, measured as group delay or phase delay or the effective propagation delay of a digital transition, may be dominated by resistive-capacitive effects, depending on the distance and other parameters, or may alternatively be dominated by inductive, wave, and speed of light effects in other realms.