A toroid with thick windings of N turns has inner and outer radii R_ 1 and R_ 2 , respectively. If it carries certain steady current I , the variation of the magnetic field due to the toroid with radial distance is

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Quantrex Academy · Accepted Answer

Correct answer: D.

Magnetic field due to toroid can be given as (i) In the open space, cxtcrior of a toroid,

B=0

A toroid with thick windings of N turns has inner and outer radii R_ 1 and R_ 2 , respectively. If it carries certain

(ii) Inside the toroid,

B=\frac{\mu_{0} N I}{2 \pi r}

Here,

r=\frac{R_{1}+R_{2}}{2}

\Rightarrow \quad B=\frac{\mu_{0} N I}{\pi\left(R_{1}+R_{2}\right)}= constant So, the variations of

B

with

r is correctly depicted in option (d). in option (d).

A toroid with thick windings of N turns has inner and outer radii...

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