A current of I ampere flows in a wire forming a circular arc of radius r metres subtending an angle \theta at the centre as shown. The magnetic field at the centre {O} in tesla is

{\mu_{0} {I} \theta}/{4 \pi {r}}

{\mu_{0} {I} \theta}/{2 \pi {r}}

MHT CET 2020 Physics Solved Paper

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A current of I ampere flows in a wire forming a circular arc of radius r metres subtending an angle θ at the centre as shown. The magnetic field at the centre O in tesla is

‌
µ0Iθ
4πr
‌
µ0Iθ
2πr
‌
µ0Iθ
2r
‌
µ0Iθ
4r

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