The iud or 'coil ' is a small plastic (or plastic and copper) device, not much longer than a match, which is placed inside your womb, where it prevents you from getting pregnant. In a coil of multiple turns of wire the magnetic field of the turns adds in the center of the coil, creating a strong field In the latter case, a coil is also called a choke coil (see also inductance).
Water dripping from coil : hvacadvice
A coil is also anything having the shape of a series of circles, one above the other:
To wind into continuous rings one above the other or one around the other
To gather (rope, wire, etc.) into loops Coil the garden hose and hang it up. In a vehicle, the coil is the part on a petrol engine that sends electricity to the spark plugs. When an electric current passes through a coil, it creates a magnetic field around the coil
Likewise, when a magnetic field interacts with a coil, it induces an electric current in the wire. A connected series of spirals or rings that rope, wire, or the like has been formed into. See examples of coil used in a sentence. Definition of coil noun in oxford advanced learner's dictionary
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There are many different types of coils used in electric and electronic equipment