A long wire bent as shown in figure carries current I. If the radius of the semicircular portion ...

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A long wire bent as shown in figure carries current I. If the radius of the semicircular portion is a, the magnetic field at center C is
(1) μ_0 I/4 a
Z ↑
(2) μ_0 I/4 π a√(π^2+4)
(3) μ_0 I/4 a+μ_0 I/4 π a
(4) μ_0 I/4 π a√((π^2-4))

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Sir pls batao direct wala portion nahin samajh me aya pls practical direction batao

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