In Fig, a rectangular loop carrying current lies in the plane of a uniform magne

Question

In Fig, a rectangular loop carrying current lies in the plane of a uniform magnetic field of magnitude 0.040T. The loop consists of a single turn of flexible conducting wire that is wrapped around a flexible mount such that the dimensions of the rectangle can be changed. (The total length of the wire is not changed.) As edge length x is varied from approximately zero to its maximum value of approximately 4 cm, the magnitude of the torque on the loop changes. The maximum value of is 4.80 X 10-8 N*m. What is the current in the loop?

Explanation / Answer

given that length of wire L = 2 Xmax                                 = 2 ( 4 cm)                          = 0.08 m areaA = ( 2 x 10-2 m)2        = 4 x 10-4 m2 magnetic moment = iA                                = 4 x 10-4 m2 but = B          =iAB      i = /AB        =4.80 X 10-8 N*m/(4 x 10-4 m2)(0.040 T)       = 3.0 mA please rate if you have any doubt please send mail i will clarify your doubt. thnak u magnetic moment = iA                                = 4 x 10-4 m2 but = B          =iAB      i = /AB        =4.80 X 10-8 N*m/(4 x 10-4 m2)(0.040 T)       = 3.0 mA please rate if you have any doubt please send mail i will clarify your doubt. thnak u

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