Homonym: coil (Spiral)
A coil is a series of loops or spirals made from a flexible material, often wire. Coils are commonly used in various applications, such as in electromagnets, where they create a magnetic field when an electric current passes through them. They can also be found in springs, which store mechanical energy, and in transformers, which transfer electrical energy between circuits.
Coils can vary in size and shape, depending on their purpose. For example, a heating coil in an electric stove heats up to cook food, while a coil spring in a car's suspension system helps absorb shocks. Their design allows for efficient use of space and energy.