[" adimensional that "(1)/(2)B^(2)mu_(0)quad " (C) "(mu^(20))/(2B)" (D) "(1)/(2)B mu_(0)^(2)],[" (A) "(B^(2))/(2 mu_(0))" (B) radius "R" carries current.The magnetic flelia at its crenter is "B" ."],[" circular coil of radius "R" carries current.The coil,the magnetic liefl will be "],[" twhat distance from the centren,on the coil,the coil,the magnetic tie foll is "],[[" (what distance from the center,on the axis of the coil,the magnetic liefl "," in ",],[18," (B) "2R," (C) "sqrt(3)R," (D) "3R]]