Current 'I' is flowing in a conductor shaped as shown in the figure. The radius of the curved part is r and the length of straight portion is very large. The value of the magnetic field at the centre O will be

Question

\( \frac{\mu_0 I}{4 \pi r} \left(\frac{3\pi}{2} + 1\right) \)

\(\frac{\mu_0 I}{4 \pi r} \left(\frac{3\pi}{2} - 1\right)\)

\(\frac{\mu_0 I}{4 \pi r} \left(\frac{\pi}{2} + 1\right)\)

\(\frac{\mu_0 I}{4 \pi r} \left(\frac{\pi}{2} - 1\right)\)

Solution

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