In mathematics, a toroid is a doughnut-shaped object, such as an O-ring. The surface of such an object is known as a torus. Its annular shape is generated by revolving a circle around an axis external to the circle.... , a doughnut-like solid whose surface is a torus
Torus
In geometry, a torus is a surface of revolution generated by revolving a circle in three dimensional space about an axis coplanar with the circle, which does not touch the circle.... .
Toroidal inductors and transformers are electronic components, typically consisting of a circular ring-shaped magnetic core of iron powder, ferrite, or other material around which wire is coiled to make an inductor.... which have wire windings on circular ring shaped magnetic cores.
A vortex ring, also called a toroidal vortex, is a region of rotating fluid moving through the same or different fluid where the flow pattern takes on a toroid shape.... , a toroid-shaped flow in fluid mechanics.
