In Fig. $29-37,$ a current $i=10 \mathrm{~A}$ is set up in a long hairpin conductor formed by bending a wire into a semicircle of radius $R=5.0 \mathrm{~mm}$. Point $b$ is midway between the straight sections and so distant from the semicircle that each straight section can be approximated as being an infinite wire. What are the (a) magnitude and (b) direction (into or out of the page) of $\vec{B}$ at $a$ and the (c) magnitude and (d) direction of $\vec{B}$ at $b ?$
Added by Mario S.
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The hairpin consists of a semicircular section and two straight sections. The current \( i = 10 \, \text{A} \) flows through the conductor. The radius of the semicircle is \( R = 5.0 \, \text{mm} = 0.005 \, \text{m} \). Show more…
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