In mathematics, a toroid is a surface of revolution with a hole in the middle. The axis of revolution passes through the hole and so does not intersect the surface. [1]

The meaning of TOROID is a surface generated by a closed plane curve rotated about a line that lies in the same plane as the curve but does not intersect it.

Mar 3, 2025 · The turns of a toroid form a helix, rather than circular loops. As a result, there is a small field external to the coil; however, the derivation above holds if the coils were circular.

The first toroid was invented in 1830 by the physicist Michael Faraday. He noticed that the change in the magnetic field resulted in the voltage in a wire. This phenomenon is known as Faraday’s …

The earliest known use of the word “toroid” dates back to the 1880s, and it was first recorded in the writings of George Carr. The toroid’s unique shape and the way it confines the magnetic …

A toroid is a three-dimensional geometric shape that resembles a doughnut or a torus. It is formed by rotating a closed curve, typically a circle, around an axis that does not intersect the curve.

Dec 22, 2025 · A surface of revolution obtained by rotating a closed plane curve about an axis parallel to the plane which does not intersect the curve. The simplest toroid is the torus. The …

Jul 2, 2025 · A toroid is a distinct and intriguing geometric shape that plays a significant role in physics, particularly in the field of electromagnetism. It is essentially a hollow ring or doughnut …

The toroid is a useful device used in everything from tape heads to tokamaks. Finding the magnetic field inside a toroid is a good example of the power of Ampere's law. The current …

Jun 11, 2023 · A toroid is a donut-shaped magnetic coil, typically made of a ferromagnetic core wrapped with wire. Toroids are used in various electrical applications, including transformers …