A long, straight wire has a radius R=0.5cm and carries a current I=10A that is NOT uniformly distributed over the cross-sectional area of the wire. It is found that the current density of the wire j depends linearly on the radius r, that is j(r)= jo r /R. a. Find jo. What physical quantity does it represent? b. Using Ampere's Law, derive the general expression for B as a function of r for rR. Then find the direction and

A long, straight wire has a radius R=0.5cm and carries a current I=10A that is NOT uniformly distributed over the cross-sectional area of the wire. It is found that the current density of the wire j depends linearly on the radius r, that is j(r)= jo r /R. a. Find jo. What physical quantity does it represent? b. Using Ampere's Law, derive the general expression for B as a function of r for rR. Then find the direction and

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

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