• Thumbnail for Electromotive force
    In electromagnetism and electronics, electromotive force (also electromotance, abbreviated emf, denoted E {\displaystyle {\mathcal {E}}} or ξ {\displaystyle...
    54 KB (6,922 words) - 22:25, 3 January 2024
  • Counter-electromotive force (counter EMF, CEMF, back EMF), is the electromotive force (EMF) manifesting as a voltage that opposes the change in current...
    4 KB (499 words) - 20:15, 5 July 2023
  • Thumbnail for Faraday's law of induction
    magnetic field will interact with an electric circuit to produce an electromotive force (emf). This phenomenon, known as electromagnetic induction, is the...
    44 KB (4,699 words) - 12:45, 7 May 2024
  • Thumbnail for Lorentz force
    formula describe the magnetic force on a current-carrying wire (sometimes called Laplace force), the electromotive force in a wire loop moving through...
    57 KB (8,238 words) - 23:06, 31 January 2024
  • Thumbnail for Electrochemical gradient
    across the membrane, then the difference in electric potential generates a force that drives ion diffusion until the charges are balanced on both sides of...
    24 KB (2,716 words) - 14:53, 18 December 2023
  • Thumbnail for Triboelectric effect
    positive, the other negative; the observations using sliding or Kelvin probe force microscope of inhomogeneous charge variations between nominally identical...
    83 KB (9,027 words) - 13:04, 9 May 2024
  • Thumbnail for Voltaic pile
    by cloth or cardboard soaked in brine, which increased the total electromotive force. When the top and bottom contacts were connected by a wire, an electric...
    16 KB (1,842 words) - 18:00, 3 May 2024
  • Thumbnail for Magnetic flux
    magnetic flux passing through a loop of conductive wire will cause an electromotive force, and therefore an electric current, in the loop. The relationship...
    10 KB (1,122 words) - 09:59, 16 February 2024
  • Thumbnail for Electromagnetic induction
    Electromagnetic or magnetic induction is the production of an electromotive force (emf) across an electrical conductor in a changing magnetic field. Michael...
    25 KB (2,843 words) - 12:40, 4 February 2024
  • Thumbnail for Voltage
    the build-up of electric charge (e.g., a capacitor), and from an electromotive force (e.g., electromagnetic induction in a generator). On a macroscopic...
    25 KB (2,909 words) - 07:12, 27 April 2024
  • IUPAC "Gold Book" defines it as; "the value of the standard emf (electromotive force) of a cell in which molecular hydrogen under standard pressure is...
    10 KB (1,479 words) - 16:32, 25 April 2024
  • Thumbnail for Ohm's law
    state, the electromotive force is proportional to the current produced. "That is, that the resistance, the ratio of the applied electromotive force (or voltage)...
    47 KB (6,024 words) - 14:12, 19 April 2024
  • Thumbnail for Volt
    electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI). One volt is defined as...
    16 KB (1,836 words) - 02:26, 28 April 2024
  • Thumbnail for Permanent magnet motor
    well as of permanent magnet motors. Back electromotive force (EMF) is also known as the counter-electromotive force. It is the voltage that occurs in electric...
    17 KB (1,982 words) - 03:31, 15 March 2024
  • Thumbnail for Electromagnetism
    electromagnetic fields. The electromagnetic force is one of the four fundamental forces of nature. It is the dominant force in the interactions of atoms and molecules...
    34 KB (3,818 words) - 23:25, 26 April 2024
  • Thumbnail for Magnetomotive force
    magnetomotive force was coined by Henry Augustus Rowland in 1880. Rowland intended this to indicate a direct analogy with electromotive force. The idea of...
    6 KB (741 words) - 19:26, 14 January 2024
  • Electric Currents. Fleming described the orientation of the induced electromotive force by referencing the motion of the conductor and the direction of the...
    16 KB (2,084 words) - 13:33, 12 March 2024
  • kinematic viscosity, electric current, electric charge, electric dipole, electromotive force (or electric potential difference), electrical resistance, capacitance...
    84 KB (1,593 words) - 19:47, 21 March 2024
  • Thumbnail for Displacement current
    the nature of the body, and on the electromotive force so that if h is the displacement, R the electromotive force, and E a coefficient depending on the...
    29 KB (3,850 words) - 17:23, 17 April 2024
  • Thumbnail for Armature (electrical)
    machine or force in a linear machine. The second role is to generate an electromotive force (EMF). In the armature, an electromotive force is created...
    10 KB (1,328 words) - 14:34, 23 February 2024
  • Thumbnail for History of electromagnetic theory
    name, that is: Electromotive force = Current × Resistance Ohm brought into order a host of puzzling facts connecting electromotive force and electric current...
    163 KB (20,870 words) - 22:46, 15 April 2024
  • Thumbnail for Thermoelectric effect
    not. The Seebeck effect (German pronunciation: [ˈzeːbɛk]) is the electromotive force (emf) that develops across two points of an electrically conducting...
    28 KB (3,686 words) - 15:53, 22 April 2024
  • Thumbnail for Electrolytic cell
    is exactly balanced by a counter-electromotive force so that no current flows. If this counter-electromotive force is increased, the cell becomes an...
    8 KB (904 words) - 11:16, 18 December 2023
  • Thumbnail for Coulomb's law
    Coulomb's law (redirect from Electric force)
    of force between two electrically charged particles at rest. This electric force is conventionally called the electrostatic force or Coulomb force. Although...
    47 KB (6,116 words) - 04:31, 28 April 2024
  • Thumbnail for Galvanic cell
    Galvani incorrectly thought the source of electricity (or source of electromotive force (emf), or seat of emf) was in the animal, Volta incorrectly thought...
    21 KB (2,885 words) - 11:14, 18 December 2023
  • Thumbnail for Coulomb
    Electrotechnical Commission (IEC), approved the volt as the unit for electromotive force, the ampere as the unit for electric current, and the coulomb as...
    8 KB (935 words) - 17:28, 13 March 2024
  • Thumbnail for Richard C. Tolman
    1080/14786440308637231. Tolman, R. C.; Stewart, T. D. (1916). "The electromotive force produced by the acceleration of metals". Physical Review. 8 (2):...
    12 KB (1,139 words) - 23:25, 10 December 2023
  • Thumbnail for Open-circuit voltage
    The value of the open-circuit voltage of a transducer equals its electromotive force (emf), which is the maximum potential difference it can produce when...
    3 KB (296 words) - 19:05, 11 January 2023
  • Thumbnail for Electrical network
    active source. An active network contains one or more sources of electromotive force. Practical examples of such sources include a battery or a generator...
    10 KB (1,238 words) - 09:27, 23 January 2024
  • Thumbnail for Thévenin's theorem
    imagine that we attach, in series with impedance Ze, a source with electromotive force E equal to Vθ but directed to oppose Vθ, as shown in Figure 2b. No...
    16 KB (1,918 words) - 05:47, 25 April 2024