P29_042 - original loop The magnitude of the torque ∆ ~τ...

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42. We replace the current loop of arbitrary shape with an assembly of small adjacent rectangular loops Flling the same area which was enclosed by the original loop (as nearly as possible). Each rectangular loop carries a current i flowing in the same sense as the original loop. As the sizes of these rectangles shrink to inFnitesimally small values, the assembly gives a current distribution equivalent to that of the
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Unformatted text preview: original loop. The magnitude of the torque ∆ ~τ exerted by ~ B on the n th rectangular loop of area ∆ A n is given by ∆ τ n = NiB sin θ ∆ A n . Thus, for the whole assembly τ = X n ∆ τ n = NiB X n ∆ A n = NiAB sin θ ....
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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