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 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 enclosed by the dashed …

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 law of …

A toroid is a doughnut-shaped object that is commonly used in electromagnetism and physics to describe the magnetic field generated by current flowing through a coil of wire wound in a circular …

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 and inductors, to …

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 field have …

Dec 3, 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 word is also used …

Different toroids come in different sizes, shapes, and materials, each with its own set of advantages and disadvantages. This article will explore the different sizes and shapes of toroids, explain the …