Explanation Given info: The width of a long flat ribbon is w and parallel to a long straight wire its near edge is at a distance a from the wire. Both wire and the ribbon carry same current I distributed uniformly over the ribbon Explanation: Consider figure 1, strip and wire can be considered as two conductors carrying same current and different geometry Figure 1 Write the expression for the magnitude of force on the thin strip of width d x and with current I d x / w using figure 1 d F = μ 0 I ( I d x / w ) L 2 π ( a + x ) (1) d F is the force acting in the small width d x I is the current through two conductors w is the width of the ribbon a the distance between edge of straight wire and ribbon Write the expression for force per unit length d F L = μ

4th Edition

ISBN: 9780134988566

Author: Wolfson, Richard

Publisher: Pearson Education,

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Chapter 26, Problem 81P

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To show: The magnitude of the force per unit between wire and ribbon is μ0J22πwln(a+wa) .

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Chapter 26 Solutions

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The magnitude of the force per unit between wire and ribbon is μ 0 J 2 2 π w ln ( a + w a ) .

Solution Summary: The author explains the magnitude of the force per unit between wire and ribbon.

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To show: The magnitude of the force per unit between wire and ribbon is μ0J22πwln(a+wa) .

Chapter 26 Solutions