Question

# A current i is uniformly disturbed over the cross section of a cylindrical conductor of radius R. The magnetic flux through the shaded rectangular plane which passes through the axis due to the long straight current is  μ0liπ2μ0liπμ0li4πμ0li2π

Solution

## The correct option is C μ0li4πBin=(μ02πiR2)r ∴ ϕ=∫R0μ02πiR2.r×ldr=μ0li4π

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