Question

What is toroid in magnetic field?

Answer 1

Toroid is a hollow circular ring on which a large number of turns of a wire are closely wound. It can be viewed as a solenoid which has been bent into a circular shape to close on itself.Nov 30, 2016

CBSE Class 12th Physics Notes Moving Charges and Magnetism

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The toroid is a useful device used in everything from tape heads to tokamaks. Magnetic field = permeability x turn density x current. For a solenoid of radius r = m with N = turns, the turn density is n=N/(2\u03c0r)= turns/m. If the current in the solenoid is I = amperes.