2. A long cylindrical wire has a radius R and a uniform current density J. In terms of J, UseAmpere's law to...a) Calculate the magnetic field at a point inside the wire.b) Calculate the magnetic field at a point outside the wire. (Obviously the current densityoutside the wire is zero, but the B field is not!)

Amperes circuital states that the line integral of magnetic field induction B→ around any closed…

Answered: 2. A long cylindrical wire has a radius…

2. A long cylindrical wire has a radius R and a uniform current density J. In terms of J, Use Ampere's law to... a) Calculate the magnetic field at a point inside the wire.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter11: Magnetic Forces And Fields

Section: Chapter Questions

Problem 65AP: An electron moving with a velocity v=(4.0i+3.0j+2.0k)106m/s enters a region where there is a uniform...

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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

2. A long cylindrical wire has a radius R and a uniform current density J. In terms of J, Use
Ampere's law to...
a) Calculate the magnetic field at a point inside the wire.
b) Calculate the magnetic field at a point outside the wire. (Obviously the current density
outside the wire is zero, but the B field is not!)

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