81 relations: Alternating current, Amber, Ampère's circuital law, Ampere, Amplitude, Band-pass filter, Chain rule, Counter-electromotive force, Direct current, Double-tuned amplifier, Electric current, Electrical conductor, Electrical network, Electrical reactance, Electrical resistance and conductance, Electromagnetic coil, Electromagnetic induction, Electromagnetism, Electromotive force, Electronic component, Electronics, Emil Lenz, Energy, Faraday's law of induction, Ferromagnetism, Flux linkage, Franz Ernst Neumann, Frequency, Fritz Langford-Smith, Galvanometer, Gyrator, Helix, Henry (unit), Hertz, Hydraulic analogy, Impedance analogy, Inductance, Inductive coupling, Inductor, International System of Units, Iron, Joseph Henry, Joule, Karl Küpfmüller, Kinetic inductance, Laplace's equation, LC circuit, Leakage inductance, Lenz's law, Lightning, ..., Linear circuit, Lodestone, Magnetic core, Magnetic domain, Magnetic field, Magnetic flux, Maxwell's equations, Michael Faraday, Ohm, Oliver Heaviside, Permeability (electromagnetism), Permeance, Phase (waves), Polarity (mutual inductance), Q factor, Radian, Resonance, RL circuit, RLC circuit, S-plane, Saturation (magnetic), Sine wave, Skin effect, Solenoid, Stokes' theorem, Symmetry of second derivatives, Transformer, Vacuum permeability, Vector potential, Volt, Voltage. Expand index (31 more) »

## Alternating current

Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction.

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## Amber

Amber is fossilized tree resin, which has been appreciated for its color and natural beauty since Neolithic times.

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## Ampère's circuital law

In classical electromagnetism, Ampère's circuital law (not to be confused with Ampère's force law that André-Marie Ampère discovered in 1823) relates the integrated magnetic field around a closed loop to the electric current passing through the loop.

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## Ampere

The ampere (symbol: A), often shortened to "amp",SI supports only the use of symbols and deprecates the use of abbreviations for units.

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## Amplitude

The amplitude of a periodic variable is a measure of its change over a single period (such as time or spatial period).

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## Band-pass filter

A band-pass filter, also bandpass filter or BPF, is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.

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## Chain rule

In calculus, the chain rule is a formula for computing the derivative of the composition of two or more functions.

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## Counter-electromotive force

Counter-electromotive force (abbreviated counter EMF or simply CEMF),Graf, "counterelectromotive force", Dictionary of Electronics also known as back electromotive force (or back EMF), is the electromotive force or "voltage" that opposes the change in current which induced it.

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## Direct current

Direct current (DC) is the unidirectional flow of electric charge.

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## Double-tuned amplifier

A double-tuned amplifier is a tuned amplifier with transformer coupling between the amplifier stages in which the inductances of both the primary and secondary windings are tuned separately with a capacitor across each.

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## Electric current

An electric current is a flow of electric charge.

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## Electrical conductor

In physics and electrical engineering, a conductor is an object or type of material that allows the flow of an electrical current in one or more directions.

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## Electrical network

An electrical network is an interconnection of electrical components (e.g. batteries, resistors, inductors, capacitors, switches) or a model of such an interconnection, consisting of electrical elements (e.g. voltage sources, current sources, resistances, inductances, capacitances).

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## Electrical reactance

In electrical and electronic systems, reactance is the opposition of a circuit element to a change in current or voltage, due to that element's inductance or capacitance.

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## Electrical resistance and conductance

The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor.

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## Electromagnetic coil

An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil, spiral or helix.

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## Electromagnetic induction

Electromagnetic or magnetic induction is the production of an electromotive force (i.e., voltage) across an electrical conductor in a changing magnetic field.

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## Electromagnetism

Electromagnetism is a branch of physics involving the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles.

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## Electromotive force

Electromotive force, abbreviated emf (denoted \mathcal and measured in volts), is the electrical intensity or "pressure" developed by a source of electrical energy such as a battery or generator.

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## Electronic component

An electronic component is any basic discrete device or physical entity in an electronic system used to affect electrons or their associated fields.

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## Electronics

Electronics is the discipline dealing with the development and application of devices and systems involving the flow of electrons in a vacuum, in gaseous media, and in semiconductors.

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## Emil Lenz

Heinrich Friedrich Emil Lenz (also Emil Khristianovich Lenz, Эмилий Христианович Ленц; 12 February 1804 – 10 February 1865), usually cited as Emil Lenz, was a Russian physicist of Baltic German ethnicity.

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## Energy

In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object.

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## Faraday's law of induction

Faraday's law of induction is a basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF)—a phenomenon called electromagnetic induction.

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## Ferromagnetism

Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets.

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## Flux linkage

In circuit theory, flux linkage is a property of a two-terminal element.

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## Franz Ernst Neumann

Franz Ernst Neumann (11 September 1798 – 23 May 1895) was a German mineralogist, physicist and mathematician.

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## Frequency

Frequency is the number of occurrences of a repeating event per unit of time.

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## Fritz Langford-Smith

Fritz Langford-Smith (29 June 1904 – 3 December 1966) was an Australian electrical engineer.

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## Galvanometer

A galvanometer is an electromechanical instrument used for detecting and indicating electric current.

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## Gyrator

A gyrator is a passive, linear, lossless, two-port electrical network element proposed in 1948 by Bernard D. H. Tellegen as a hypothetical fifth linear element after the resistor, capacitor, inductor and ideal transformer.

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## Helix

A helix, plural helixes or helices, is a type of smooth space curve, i.e. a curve in three-dimensional space.

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## Henry (unit)

The henry (symbol: H) is the SI derived unit of electrical inductance.

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## Hertz

The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.

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## Hydraulic analogy

The electronic–hydraulic analogy (derisively referred to as the drain-pipe theory by Oliver Lodge) is the most widely used analogy for "electron fluid" in a metal conductor.

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## Impedance analogy

The impedance analogy is a method of representing a mechanical system by an analogous electrical system.

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## Inductance

In electromagnetism and electronics, inductance is the property of an electrical conductor by which a change in electric current through it induces an electromotive force (voltage) in the conductor.

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## Inductive coupling

In electrical engineering, two conductors are referred to as inductively coupled or magnetically coupled when they are configured such that a change in current through one wire induces a voltage across the ends of the other wire through electromagnetic induction.

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## Inductor

An inductor, also called a coil, choke or reactor, is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it.

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## International System of Units

The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement.

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## Iron

Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.

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## Joseph Henry

Joseph Henry (December 17, 1797 – May 13, 1878) was an American scientist who served as the first Secretary of the Smithsonian Institution.

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## Joule

The joule (symbol: J) is a derived unit of energy in the International System of Units.

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## Karl Küpfmüller

Karl Küpfmüller (6 October 1897 – 26 December 1977) was a German electrical engineer, who was prolific in the areas of communications technology, measurement and control engineering, acoustics, communication theory and theoretical electro-technology.

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## Kinetic inductance

Kinetic inductance is the manifestation of the inertial mass of mobile charge carriers in alternating electric fields as an equivalent series inductance.

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## Laplace's equation

In mathematics, Laplace's equation is a second-order partial differential equation named after Pierre-Simon Laplace who first studied its properties.

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## LC circuit

An LC circuit, also called a resonant circuit, tank circuit, or tuned circuit, is an electric circuit consisting of an inductor, represented by the letter L, and a capacitor, represented by the letter C, connected together.

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## Leakage inductance

Leakage inductance is that property of an electrical transformer that causes a winding to appear to have some pure inductance in series with the mutually-coupled transformer windings.

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## Lenz's law

Lenz's law (pronounced), named after the physicist Heinrich Friedrich Emil Lenz who formulated it in 1834, states that the direction of current induced in a conductor by a changing magnetic field due to induction is such that it creates a magnetic field that opposes the change that produced it.

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## Lightning

Lightning is a sudden electrostatic discharge that occurs typically during a thunderstorm.

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## Linear circuit

A linear circuit is an electronic circuit in which, for a sinusoidal input voltage of frequency f, any steady-state output of the circuit (the current through any component, or the voltage between any two points) is also sinusoidal with frequency f. Note that the output need not be in phase with the input.

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## Lodestone

A lodestone is a naturally magnetized piece of the mineral magnetite.

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## Magnetic core

A magnetic core is a piece of magnetic material with a high magnetic permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, generators, inductors, magnetic recording heads, and magnetic assemblies.

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## Magnetic domain

A magnetic domain is a region within a magnetic material in which the magnetization is in a uniform direction.

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## Magnetic field

A magnetic field is a vector field that describes the magnetic influence of electrical currents and magnetized materials.

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## Magnetic flux

In physics, specifically electromagnetism, the magnetic flux (often denoted or) through a surface is the surface integral of the normal component of the magnetic field B passing through that surface.

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## Maxwell's equations

Maxwell's equations are a set of partial differential equations that, together with the Lorentz force law, form the foundation of classical electromagnetism, classical optics, and electric circuits.

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## Michael Faraday

Michael Faraday FRS (22 September 1791 – 25 August 1867) was an English scientist who contributed to the study of electromagnetism and electrochemistry.

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## Ohm

The ohm (symbol: Ω) is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm.

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## Oliver Heaviside

Oliver Heaviside FRS (18 May 1850 – 3 February 1925) was an English self-taught electrical engineer, mathematician, and physicist who adapted complex numbers to the study of electrical circuits, invented mathematical techniques for the solution of differential equations (equivalent to Laplace transforms), reformulated Maxwell's field equations in terms of electric and magnetic forces and energy flux, and independently co-formulated vector analysis.

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## Permeability (electromagnetism)

In electromagnetism, permeability is the measure of the ability of a material to support the formation of a magnetic field within itself.

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## Permeance

Permeance, in general, is the degree to which a material admits a flow of matter or energy.

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## Phase (waves)

Phase is the position of a point in time (an instant) on a waveform cycle.

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## Polarity (mutual inductance)

In electrical engineering, dot marking convention, or alphanumeric marking convention, or both, can be used to denote the same relative instantaneous polarity of two mutually inductive components such as between transformer windings.

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## Q factor

In physics and engineering the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is, and characterizes a resonator's bandwidth relative to its centre frequency.

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## Radian

The radian (SI symbol rad) is the SI unit for measuring angles, and is the standard unit of angular measure used in many areas of mathematics.

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## Resonance

In physics, resonance is a phenomenon in which a vibrating system or external force drives another system to oscillate with greater amplitude at specific frequencies.

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## RL circuit

A resistor–inductor circuit (RL circuit), or RL filter or RL network, is an electric circuit composed of resistors and inductors driven by a voltage or current source.

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## RLC circuit

An RLC circuit is an electrical circuit consisting of a resistor (R), an inductor (L), and a capacitor (C), connected in series or in parallel.

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## S-plane

In mathematics and engineering, the s-plane is the complex plane on which Laplace transforms are graphed.

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## Saturation (magnetic)

Seen in some magnetic materials, saturation is the state reached when an increase in applied external magnetic field H cannot increase the magnetization of the material further, so the total magnetic flux density B more or less levels off.

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## Sine wave

A sine wave or sinusoid is a mathematical curve that describes a smooth periodic oscillation.

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## Skin effect

Skin effect is the tendency of an alternating electric current (AC) to become distributed within a conductor such that the current density is largest near the surface of the conductor, and decreases with greater depths in the conductor.

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## Solenoid

A solenoid (/ˈsolə.nɔɪd/) (from the French solénoïde, derived in turn from the Greek solen ("pipe, channel") and eidos ("form, shape")) is a coil wound into a tightly packed helix.

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## Stokes' theorem

In vector calculus, and more generally differential geometry, Stokes' theorem (also called the generalized Stokes theorem or the Stokes–Cartan theorem) is a statement about the integration of differential forms on manifolds, which both simplifies and generalizes several theorems from vector calculus.

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## Symmetry of second derivatives

In mathematics, the symmetry of second derivatives (also called the equality of mixed partials) refers to the possibility under certain conditions (see below) of interchanging the order of taking partial derivatives of a function of n variables.

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## Transformer

A transformer is a static electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

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## Vacuum permeability

The physical constant μ0, (pronounced "mu naught" or "mu zero"), commonly called the vacuum permeability, permeability of free space, permeability of vacuum, or magnetic constant, is an ideal, (baseline) physical constant, which is the value of magnetic permeability in a classical vacuum.

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## Vector potential

In vector calculus, a vector potential is a vector field whose curl is a given vector field.

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## Volt

The volt (symbol: V) is the derived unit for electric potential, electric potential difference (voltage), and electromotive force.

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## Voltage

Voltage, electric potential difference, electric pressure or electric tension (formally denoted or, but more often simply as V or U, for instance in the context of Ohm's or Kirchhoff's circuit laws) is the difference in electric potential between two points.

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## Redirects here:

Coefficient of coupling, Coupled inductors, Coupling coefficient (inductors), Derivation of self inductance, Electric inductance, Electric mutual induction, Electric self-induction, Electrical inductance, Inductance with physical symmetry, Inductance/derivation of self inductance, Magnetic mutual induction, Magnetic self-induction, Magnetoelectric induction, Mutual Inductance, Mutual Induction, Mutual inductance, Mutual induction, Mutual inductor, Neumann formula, Self Inductance, Self inductance, Self-inductance.

## References

[1] https://en.wikipedia.org/wiki/Inductance