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A steady current I flows along an infini...

A steady current I flows along an infinitely long hollow cylindrical conductor of radius R. This cylinder is placed coaxially inside an infinite solenoid of radius 2R. The solenoid has n turns per unit length and carries a steady current I. Consider a point P at a distance r from the common axis. The correct statements(s) is (are) O In the region 0 2R, the magnetic field is non-zero

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