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In electrical engineering
Electrical engineering

Electrical engineering, sometimes referred to as electrical and electronic engineering, is a field of engineering that deals with the study and application of electricity, electronics and electromagnetism....
, two conductors are referred to as "inductively coupled" when they are configured such that change in current flow through one wire induces
Faraday's law of induction

Faraday's law of induction describes a basic law of electromagnetism, which is involved in the working of transformers, inductors, and many forms of electrical generators....
 a voltage across the ends of the other wire.

The two conductors may be physically contained in a single unit, as in the primary and secondary sides of a transformer
Transformer

A transformer is a device that transfers electrical energy from one electrical network to another through inductive coupling conductors — the transformer's coils or "windings"....
, or may be separated as in the antennas on a transmitter and a receiver. Coupling may be intentional or unintentional.

Unintentional coupling is called cross-talk, and is a form of interference.






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In electrical engineering
Electrical engineering

Electrical engineering, sometimes referred to as electrical and electronic engineering, is a field of engineering that deals with the study and application of electricity, electronics and electromagnetism....
, two conductors are referred to as "inductively coupled" when they are configured such that change in current flow through one wire induces
Faraday's law of induction

Faraday's law of induction describes a basic law of electromagnetism, which is involved in the working of transformers, inductors, and many forms of electrical generators....
 a voltage across the ends of the other wire.

The two conductors may be physically contained in a single unit, as in the primary and secondary sides of a transformer
Transformer

A transformer is a device that transfers electrical energy from one electrical network to another through inductive coupling conductors — the transformer's coils or "windings"....
, or may be separated as in the antennas on a transmitter and a receiver. Coupling may be intentional or unintentional.

Unintentional coupling is called cross-talk, and is a form of interference. Inductive coupling favors low frequency energy sources. High frequency energy sources generally use capacitive coupling
Capacitive coupling

In electronics, capacitive coupling is the transfer of energy within an electrical network by means of the capacitance between circuit nodes. This coupling can be an intentional or accidental effect....
.

An inductively coupled transponder
Transponder

In telecommunication, the term transponder has the following meanings:* An automatic information appliance that receiver , amplifier, and Transmission a Signalling on a different frequency ....
 comprises an electronic data carrying device, usually a single microchip, and a large coil that functions as an antenna. Inductively coupled transponders are almost always operated passively.

Implementations

Devices that use inductive coupling
  • Transformer
    Transformer

    A transformer is a device that transfers electrical energy from one electrical network to another through inductive coupling conductors — the transformer's coils or "windings"....
     for AC power coupling and inductive charging
    Inductive charging

    Inductive charging charges electrical batteries using electromagnetic induction. A charging station sends energy through inductive coupling to an electrical device, which stores the energy in the batteries....
  • Graphics tablet
    Graphics tablet

    A graphics tablet is a computer input device that allows one to hand-draw images and graphics, similar to the way one draws images with a pencil and paper....
  • Radio Frequency Identification
    Radio Frequency Identification

    Radio-frequency identification is the use of an object applied to or incorporated into a product, animal, or person for the purpose of identification and tracking using radio waves....
  • Inductive Modems


A variety of inductive charging
Inductive charging

Inductive charging charges electrical batteries using electromagnetic induction. A charging station sends energy through inductive coupling to an electrical device, which stores the energy in the batteries....
 products charge batteries using inductive coupling, such as eCoupled
Ecoupled

eCoupled is a proprietary near-field wireless energy transfer technology developed by Fulton Innovation, a division of Alticor. It provides wireless power transfer via inductive coupling between a primary transmission coil and a secondary receiving coil....
.

Low frequency induction


Low frequency induction is an unwanted form of inductive coupling, which can occur when a metallic pipeline
Pipeline transport

Pipeline transport is the transportation of goods through a Pipe . Most commonly, liquid and gases are sent, but pneumatic tubes that transport solid capsules using compressed air have also been used....
 is installed parallel to a high-voltage power line. The pipeline, which is a conductor, and is insulated from the earth by its protective coating, can develop voltages which are hazardous to personnel operating valves or otherwise contacting the pipeline.