[" 75.A current I flows in an infinitely...

[" 75.A current I flows in an infinitely long wire with "],[" cross-section in the form of a semicirular ring of radius "R" ."],[" The magnitude of the magnetic induction along its axis is "],[[" (a) "(mu_(0)I)/(pi^(2)R)," (b) "(mu_(0)I)/(2 pi^(2)R)" (c) "(mu_(0)I)/(2 pi R)]]

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[" 75.A current I flows in an infinitely long wire with "],[" cross-section in the form of a semicirular ring of radius "R" ."],[" The magnitude of the magnetic induction along its axis is "],[[" (a) "(mu_(0)I)/(pi^(2)R)," (b) "(mu_(0)I)/(2 pi^(2)R)" (c) "(mu_(0)I)/(2 pi R)]]

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