capacitance

(noun)

The property of an electric circuit or its element that permits it to store charge, defined as the ratio of stored charge to potential over that element or circuit (Q/V); SI unit: farad (F).

Related Terms

  • capacitor
  • dielectric

Examples of capacitance in the following topics:

  • Combinations of Capacitors: Series and Parallel

    • Like in the case of resistors in parallel, the reciprocal of the circuit's total capacitance is equal to the sum of the reciprocals of the capacitance of each individual capacitor :
    • Total capacitance for a circuit involving several capacitors in parallel (and none in series) can be found by simply summing the individual capacitances of each individual capacitor .
    • To find total capacitance of the circuit, simply break it into segments and solve piecewise .
    • With effectively two capacitors left in parallel, we can add their respective capacitances (c) to find the total capacitance for the circuit.
    • Calculate the total capacitance for the capacitors connected in series and in parallel
  • Capacitance

    • Capacitance is the measure of an object's ability to store electric charge.
    • Capacitance is the measure of an object's ability to store electric charge.
    • Any body capable of being charged in any way has a value of capacitance.
    • For a parallel-plate capacitor, this equation can be used to calculate capacitance:
    • Express the relationship between the capacitance, charge of an object, and potential difference in the form of equation
  • Capacitors with Dielectrics

    • A dielectric partially opposes a capacitor's electric field but can increase capacitance and prevent the capacitor's plates from touching.
    • If it has a high permittivity, it also increases the capacitance for any given voltage.
    • The capacitance for a parallel-plate capacitor is given by:
  • RLC Series Circuit: At Large and Small Frequencies; Phasor Diagram

    • Response of an RLC circuit depends on the driving frequency—at large enough frequencies, inductive (capacitive) term dominates.
    • The impedance Z at small frequencies $(\nu \ll \frac{1}{\sqrt{2\pi LC}})$ is dominated by the capacitive term, assuming that the frequency is high enough so that XC is much larger than R.
  • Parallel-Plate Capacitor

    • For a parallel-plate capacitor, capacitance (C) is related to dielectric permittivity (ε), surface area (A), and separation between the plates (d):
  • Parallel-Plate Capacitor

    • Accordingly, capacitance is greatest in devices with high permittivity, large plate area, and minimal separation between the plates.
  • Capacitors in AC Circuits: Capacitive Reactance and Phasor Diagrams

    • However, the value of Vmax/Imax is useful, and is called the capacitive reactance (XC) of the component.
    • The value of XC (C standing for capacitor) depends on its capacitance (C) and the frequency (f) of the alternating current.
  • Female Duct System

    • The secretions also promote capacitation of the sperm by removing glycoproteins and other molecules from the plasma membrane of the sperm.
  • Fertilization

    • The sperm must undergo capacitation in the female's reproductive tract over several hours, which increases its motility and destabilizes its membrane.
  • Impedance

    • Express the relationship between the impedance, the resistance, and the capacitance of a series RC circuit in a form of equation
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