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=**__Electricity: Mrs. Walters' third Period Science__**[|search engine]=
 * [|Electric charge]** – a property of some [|subatomic particles], which determines their [|electromagnetic interactions]. Electrically charged matter is influenced by, and produces, electromagnetic fields.

Inductors
Inductors follow the same law, in that the total inductance of non-coupled inductors in series is equal to the sum of their individual inductances: However, in some situations it is difficult to prevent adjacent inductors from influencing each other, as the magnetic field of one device couples with the windings of its neighbours. This influence is defined by the mutual inductance M. For example, if you have two inductors in series, there are two possible equivalent inductances depending on how the magnetic fields of both inductors influence each other. When there are more than two inductors, the mutual inductance between each of them and the way the coils influence each other complicates the calculation. For a larger number of coils the total combined inductance is given by the sum of all mutual inductances between the various coils including the mutual inductance of each given coil with itself, which we term self-inductance or simply inductance. For three coils, there are six mutual inductances //M//12 ,  //M//13  ,  //M//23  and  //M//21  ,  //M//31  and  //M//32. There are also the three self-inductances of the three coils: //M//11 ,  //M//22  and  //M//33. Therefore //L//total = (//M//11 + //M//22 + //M//33) + (//M//12 + //M//13 + //M//23) + (//M//21 + //M//31 + //M//32) By reciprocity //M////i////j//  =  //M////j////i//  so that the last two groups can be combined. The first three terms represent the sum of the self-inductances of the various coils. The formula is easily extended to any number of series coils with mutual coupling. The method can be used to find the self-inductance of large coils of wire of any cross-sectional shape by computing the sum of the mutual inductance of each turn of wire in the coil with every other turn since in such a coil all turns are in series.From Wikipedia,
 * [|Electric current]** – a movement or flow of electrically charged particles, typically measured in [|amperes]. from wikipedia.

Electric charge is a property of certain [|subatomic particles], which gives rise to and interacts with, the [|electromagnetic force], one of the four [|fundamental forces] of nature. Charge originates in the [|atom], in which its most familiar carriers are the [|electron] and [|proton]. It is a [|conserved quantity], that is, the net charge within an [|isolated system] will always remain constant regardless of any changes taking place within that system.1sezz Within the system, charge may be transferred between bodies, either by direct contact, or by passing along a conducting material, such as a wire.[|[16]] The informal term [|static electricity] refers to the net presence (or 'imbalance') of charge on a body, usually caused when dissimilar materials are rubbed together, transferring charge from one to the other.