electromotive force wikipedia
Voltage
Voltage is also called, in certain circumstances, electromotive force (EMF). Voltage is an electrical potential difference, the difference in electric potential between two places. The unit for electrical potential difference, or voltage, is the volt. The volt is named in memory of Alessandro Volta. One volt equals one joule per coulomb.
Electromagnetism
It is the dominant force in the interactions of atoms and molecules. Electromagnetism can be thought of as a combination of electrostatics and magnetism, which are distinct but closely intertwined phenomena. Electromagnetic forces occur between any two charged particles. Electric forces cause an attraction between particles with opposite ...
Faraday''s law of induction
OverviewHistoryFaraday''s lawExceptionsFaraday''s law and relativitySee alsoFurther readingExternal links
Faraday''s law of induction (or simply Faraday''s law) is a law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (emf). This phenomenon, known as electromagnetic induction, is the fundamental operating principle of transformers, inductors, and many types of electric motors, generators and solenoids.
20.1: Overview
Electromotive "force" is not considered a force (as force is measured in newtons) but a potential, or energy per unit of charge, measured in volts. Formally, EMF is classified as the external work expended per unit of charge to produce an electric potential difference across two open-circuited terminals.
Lực điện động – Wikipedia tiếng Việt
Lực điện động hay suất điện động hay "Lực lạ" (tiếng Anh: emf - electromotive force, đơn vị là vôn) của nguồn điện là đại lượng đặc trưng cho khả năng thực hiện công của nguồn điện và đo bằng thương số giữa công A của lực lạ thực hiện khi làm dịch chuyển một điện tích dương bên trong nguồn điện ...
Talk:Counter-electromotive force
In an inductor, the counter EMF opposes any change in current. This EMF, or voltage, can become very high if the current is forced [or caused] to change quickly. This is the characteristic that causes the reactive opposition to AC current flow and initiates the inductive kick of a spark coil, or relay coil.
Force électromotrice — Wikipédia
La distinction entre force électromotrice d''induction et force contre-électromotrice d''induction est artificielle : le phénomène est unique. Si le courant, qui circule effectivement dans le conducteur, le fait selon le sens qui lui permet de s''opposer à la variation de flux alors on dit que l''on a affaire à une f.e.m. : cette f.e.m. est (parfois en partie) génératrice …
Transformer
Transformer. In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits. A varying current in any coil of the transformer produces a varying magnetic flux in the transformer''s core, which induces a varying electromotive force (EMF) across ...
Gaya gerak listrik
Gaya gerak listrik, disingkat ggl (bahasa Inggris: electromotive force (emf), dilambangkan dan diukur dalam volt), adalah aksi listrik yang dihasilkan oleh sumber non-listrik. Perangkat yang mengubah bentuk energi lain menjadi energi listrik ("transduser"), seperti baterai (mengubah energi kimia) atau generator (mengubah energi mekanik), menghasilkan ggl …
Standard electrode potential
Standard electrode potential. In electrochemistry, standard electrode potential, or, is a measure of the reducing power of any element or compound. The 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 oxidized to solvated protons at the left ...
EMF – Wikipedia
EMF steht als Abkürzung für: EMF-Format, siehe Windows Enhanced Metafile. Eclipse Modeling Framework, ein Java-Framework. Eidgenössisches Musikfest. Electromotive Force, siehe Elektromotorische Kraft. Elektromagnetisches Feld. Elektro-mechanische Feststellbremse. Elektromechanische Feststellung, Teil einer Feststellanlage für ...
Fuerza electromotriz
La fuerza electromotriz en un circuito cerrado es igual a la variación del flujo de inducción del campo magnético que lo atraviesa en la unidad de tiempo, lo que se expresa por la ecuación ( Ley de Faraday ): . A esta ley se le añade un signo ''-'' que indica que el sentido de ε inducido es tal que se opone al descrito por la ley de ...
Força eletromotriz – Wikipédia, a enciclopédia livre
A força eletromotriz é o trabalho por unidade de carga que uma força não- eletrostática realiza quando uma carga é transportada de um ponto a outro por um particular trajeto; isto é, a força eletromotriz, contrariamente da U, depende do caminho. Por exemplo, a força eletromotriz em uma pilha ou bateria somente existe entre dois pontos ...
Electromagnetic induction
Electromagnetic or magnetic induction is the production of an electromotive force (emf) across an electrical conductor in a changing magnetic field . Michael Faraday is generally credited with the discovery of induction in 1831, and James Clerk Maxwell mathematically described it as Faraday''s law of induction. Lenz''s law describes the direction ...
ELECTROMOTIVE | English meaning
ELECTROMOTIVE definition: 1. having an electric motor or relating to something that has an electric motor: 2. producing an…. Learn more. In the detailed analysis it was shown that the thermal fluctuations within the diode generate an electromotive force that cancels the voltage from rectified current fluctuations.
Electromagnetic induction
Electrodynamics. Electrical Network. Covariant formulation. v. t. e. Electromagnetic induction is where a voltage or current is produced in a conductor by a changing magnetic flux. It may happen when a magnet is moved in a solenoid, or when a solenoid is constantly moved in a stationary magnetic field, thus changing the magnetic flux.
Electromotive force | Definition, Symbols, & Units | Britannica
Electromotive force is the characteristic of any energy source capable of driving electric charge around a circuit. It is abbreviated E in the international metric system but also, popularly, as emf. Despite its name, electromotive force is not actually a force. It is commonly measured in units of volts, equivalent in the metre – kilogram ...
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