Consider the circuit in the figure $($b$).$

Two circular arcs have radii $a=26\mathrm{.}0cm$ and $b=13\mathrm{.}0cm,$ subtend angle $=35,$ carry current $i=22A,$ and share the same center of curvature $P.$ What is the magnitude and direction $($positive $=$ out of the page, and

negative $=$ into the page$)$ of the net magnetic field at P$?$

${8\mathrm{.}64}^{***}{10}^{-7}$

Only the curved segments contribute.

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