ch26_p19 - 19. The resistance of the coil is given by R =...

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19. The resistance of the coil is given by R = ρ L / A , where L is the length of the wire, is the resistivity of copper, and A is the cross-sectional area of the wire. Since each turn of wire has length 2 π r , where r is the radius of the coil, then L = (250)2 π r = (250)(2 π )(0.12 m) = 188.5 m. If r w is the radius of the wire itself, then its cross-sectional area is
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This note was uploaded on 01/25/2011 for the course PHYSICS 17029 taught by Professor Rebello,nobels during the Spring '10 term at Kansas State University.

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