Current i is carried in a wire of length...

Current `i` is carried in a wire of length `L`. If the wire is turned into a circular coil, the maximum magnitude of torque in a given magnetic field `B` will be

`(Li B^(2))/2`

`(Li^(2)B)/2`

`(L^(2)iB)/(4pi)`

`(Li^(2)B)/(4pi)`

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