Question: Consider a collection of current loops where Using the notation of the text for variables that are to be held constant in partial derivatives, prove

Consider a collection of current loops where

UB || 1 2 N k=1 ..

Using the notation of the text for variables that are to be held constant in partial derivatives, prove that the magnetic force exerted on the ith loop satisfies

UB || 1 2 N k=1 ..

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