A wire bent into a circular arc of radius (R) subtending an angle (phi) carries a current
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A wire bent into a circular arc of radius \(R\) subtending an angle \(\phi\) carries a current of magnitude \(I\) (Figure 28.35). Use the Biot-Savart law to derive an expression for the magnitude of the magnetic field \(\vec{B}\) produced at point \(\mathrm{P}\), located at the center of the arc.
Data from Figure 28.35
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