A straight wire carrying current i is turned into a circular loop. If the magnitude of magnetic moment associated with it in M.K.S. unit is M, the length of wire will be

(a) 4πiM                          (b) 4πMi

(c) 4πiM                        (d) Mπ4i

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#2 | Magnetic Field & Magnetic Field Lines

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Magnetic field and field lines

Magnetic moment of circular loop carrying current

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