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  2. Capacitance - Wikipedia

    en.wikipedia.org/wiki/Capacitance

    A common form is a parallel-plate capacitor, which consists of two conductive plates insulated from each other, usually sandwiching a dielectric material. In a parallel plate capacitor, capacitance is very nearly proportional to the surface area of the conductor plates and inversely proportional to the separation distance between the plates.

  3. Capacitor - Wikipedia

    en.wikipedia.org/wiki/Capacitor

    Charge separation in a parallel-plate capacitor causes an internal electric field. A dielectric (orange) reduces the field and increases the capacitance. A simple demonstration capacitor made of two parallel metal plates, using an air gap as the dielectric. A capacitor consists of two conductors separated by a non-conductive region. [23]

  4. Quantum capacitance - Wikipedia

    en.wikipedia.org/wiki/Quantum_capacitance

    Quantum capacitance, [1] also known as chemical capacitance [2] and electrochemical capacitance ¯, [3] was first theoretically introduced by Serge Luryi (1988), [1] and is defined as the variation of electrical charge with respect to the variation of electrochemical potential ¯, i.e., ¯ = ¯. [3]

  5. Electric displacement field - Wikipedia

    en.wikipedia.org/wiki/Electric_displacement_field

    A parallel plate capacitor. Using an imaginary box, it is possible to use Gauss's law to explain the relationship between electric displacement and free charge. Consider an infinite parallel plate capacitor where the space between the plates is empty or contains a neutral, insulating medium. In both cases, the free charges are only on the metal ...

  6. Paschen's law - Wikipedia

    en.wikipedia.org/wiki/Paschen's_law

    This is the case in a parallel-plate capacitor setup. The electrodes may have the distance . The cathode is located at the point =. To get impact ionization, the electron energy must become greater than the ionization energy of the gas atoms between the plates.

  7. Introduction to electromagnetism - Wikipedia

    en.wikipedia.org/wiki/Introduction_to...

    A parallel plate capacitor. A capacitor is an electronic component that stores electrical potential energy in an electric field between two oppositely charged conducting plates. If one of the conducting plates has a charge density of +Q/A and the other has a charge of -Q/A where A is the area of the plates, then there will be an electric field ...

  8. Permittivity - Wikipedia

    en.wikipedia.org/wiki/Permittivity

    The formula for capacitance in a parallel plate capacitor is written as C = ε A d {\displaystyle C=\varepsilon \ {\frac {A}{d}}} where A {\displaystyle A} is the area of one plate, d {\displaystyle d} is the distance between the plates, and ε {\displaystyle \varepsilon } is the permittivity of the medium between the two plates.

  9. Capacitor types - Wikipedia

    en.wikipedia.org/wiki/Capacitor_types

    Theoretically, given two capacitors with the same mechanical dimensions and dielectric, but one of them have half the thickness of the dielectric. With the same dimensions this one could place twice the parallel-plate area inside. This capacitor has theoretically 4 times the capacitance as the first capacitor but half of the voltage proof.