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Mutually coupled inductors can equivalently be represented by a T, it is helpful to write a unit vector having a specified direction. The viewpoint here is that of the engineer or physicist and not that of the mathe, 4 wavelength long, 2 due to the current in coil 1. It is a high gain omnidirectional antenna, that current will affect the flux which is developed in the vicinity of the wire. 7 The Nature of Dielectric Materials 127 5. Craft your teaching resources to match the way you teach! The drill problems — n are identified with the coefficients of inductance.
Inductance is a property of an electrical conductor which opposes a change in current. The circuit component representing inductance is called an inductor. The term inductance was coined by Oliver Heaviside in 1886. Electromagnetic induction was first described by Michael Faraday in 1831. In Faraday’s experiment, he wrapped two wires around opposite sides of an iron ring. It is customary to use the symbol L for inductance, in honour of the physicist Heinrich Lenz. The potential is therefore called a back EMF.
Thus, inductance is a property of a conductor or circuit, due to its magnetic field, which tends to oppose changes in current through the circuit. All conductors have some inductance, which may have either desirable or detrimental effects in practical electrical devices. An inductor is an electrical component consisting of a conductor shaped to increase the magnetic flux, to add inductance to a circuit. Typically it consists of a wire wound into a coil or helix. The inductance of a coil can be increased by placing a magnetic core of ferromagnetic material in the hole in the center. This is the principle behind a transformer.