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A coil of wire has some special properties. The biggest one is its inductance (specifically its self-inductance); a coil tends to have a much higher self-inductance than a straight wire because the magnetic field from the charge flowing in one part of the coil will cross through the other wires in the coil.

As a result, coils are often used as transducers to convert mechanical energy to electrical energy (e.g. as an electrical generator) or to convert electrical energy to mechanical energy (e.g. as a speaker).

A coil can also be referred to as a solenoid, in which case the emphasis is on the magnetic field created around the coil when there are charges flowing through it.

NOTE: All information contained within this article is pure opinion. Although this article is intended to help people, it may contain faulty or misleading information. This article is not to be considered professional opinion or advice, and is in no way a replacement for reading all safety/instructional documentation. Always remember to protect yourself when handling/using hazardous materials, as well as test new techniques before using them on projects/work intended to be handed in or used.

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