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. A coil of rope lay on the beach A coil of thick blue smoke rose up from his pipe. 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 the latter case, a coil is also called a choke coil (see also inductance). 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. 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.
There are many different types of coils used in electric and electronic equipment 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 This drawing shows a cross section through the center of the coil.
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