Main Page | See live article | Alphabetical index


A Toroid is a doughnut-shaped object enclosed by a torus. It has a ring-shaped surface generated by rotating a circle around an axis that does not intersect the circle. Usually, a toroid is composed of a coil of insulated wire in a donut shape (and is usually composed of iron or similar metals).

Toroids are inductors in circuits. Primarily used in low frequencies transception for the inductances properties needed. Toroid possess greater inductance properties and carry greater current then similarly constructed solenoids. Toroidal coils reduces resistance, due to diuameter and numeber. In a toroid, magnetic fluxes are confined in the toroid's core.

See also