Answer :
the strength of the magnetic field within the toroid and at a distance of r from the toroid's axis
the magnitude of the magnetic field inside the toroid be
B(r)=[tex]\frac{\mu IN}{2\pi r}[/tex]
when only in [tex]r^{\cap}[/tex] any [tex]k^{\cap}[/tex] direction
B=[tex]\frac{\mu_{0} I }{2R}[/tex]
A magnetic field is a vector field that explains the magnetic influence on moving electric charges, electric currents, and magnetic materials. A force perpendicular to the charge's own motion and the magnetic field acts on it while the charge is traveling through a magnetic field. The magnetic field of a permanent magnet pulls on ferromagnetic elements like iron and attracts or repels other magnets. The three other magnetic effects of paramagnetism, diamagnetism, and antiferromagnetism also exert minute forces on "nonmagnetic" materials in a nonuniform magnetic field, albeit these forces are often so minute that they can only be measured by laboratory equipment. Electric currents, like those utilized in electromagnets, and electric fields that change over time produce magnetic fields that surround magnetized things.
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