Noun
(mathematics) A surface generated by a closed curve (especially a circle) rotating about, but not intersecting or containing, an axis in its own plane.
A ring-shaped object whose surface is a torus.
Source: en.wiktionary.orgFerrite toroid Hall effect current transducer Diagram of Hall effect current transducer integrated into ferrite ring. Source: Internet
The top load or "toroid" electrode Most unipolar Tesla coil designs have a spherical or toroidal shaped metal electrode on the high voltage terminal. Source: Internet
A toroid with a major diameter that is much larger than the secondary diameter provides improved shaping of the electrical field at the topload. Source: Internet
The limit to which the field can be increased is usually not economic but physical and it relates to the impossibility of bringing the inner legs of the toroid any closer together and still leave room for the bucking cylinder. Source: Internet
The oscillating primary current creates an oscillating magnetic field that couples to the secondary winding, transferring energy into the secondary side of the transformer and causing it to oscillate with the toroid capacitance to ground. Source: Internet
The streamers transfer charge between the leaders and toroid to nearby space charge regions. Source: Internet