a. Derive an expression for the magnetic field strength at
Chapter 29, Problem 29.118(choose chapter or problem)
a. Derive an expression for the magnetic field strength at distance d from the center of a straight wire of finite length l that carries current I. b. Determine the field strength at the center of a currentcarrying square loop having sides of length 2R. c. Compare your answer to part b to the field at the center of a circular loop of diameter 2R. Do so by computing the ratio Bsquare/Bcircl
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