Two points inside the winding region of an ideal toroid are at radial distances r and 2r. Find (field at r)/(field at 2r).
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Question

Two points inside the winding region of an ideal toroid are at radial distances r and 2r. Find (field at r)/(field at 2r).

G1 Physics · Accepted Answer

Toroidal field varies as 1/r, so field at r is twice field at 2r.