College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Question
A wire carrying a current I is bent into the shape of an exponential spiral, r = eθ, from θ = 0 to θ = 2π as suggested in the figure. To complete a loop, the ends of the spiral are connected by a straight wire along the x axis. (a) The angle β between a radial line and its tangent line at any point on a
curve r = f(θ) is related to the function by
tan β = (r)/(dr/dθ)
Use this fact to show that β = π/4. (b) Find the magnetic field at the origin.
![r= e0
dr
Figure P29.47
8.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6088932e-1b86-4ec5-b521-62680913048d%2F323d3c53-6af1-4f84-8769-2a364139be43%2Fa1zjwnd.png&w=3840&q=75)
Transcribed Image Text:r= e0
dr
Figure P29.47
8.
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