A circular arc of radius R subtends an angle θ radians at its centre and carries current I. What is the magnetic-field magnitude at the centre?
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A circular arc of radius R subtends an angle θ radians at its centre and carries current I. What is the magnetic-field magnitude at the centre?

G1 Physics · Accepted Answer

For an arc of angle θ radians, integration of the Biot–Savart law gives B=μ₀Iθ/(4πR).