Determine the magnetic field at the surface of the wire. Determine the magnetic field inside the wire, 0.50 mmmm below the surface. Determine the magnetic field outside the wire 2.5 mmmm from the surface.

Determine the magnetic field at the surface of the wire. Determine the magnetic field inside the wire, 0.50 mmmm below the surface. Determine the magnetic field outside the wire 2.5 mmmm from the surface.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 3CQ: How can you decide if a wire is infinite?

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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

Determine the magnetic field at the surface of the wire.

Determine the magnetic field inside the wire, 0.50 mmmm below the surface.

Determine the magnetic field outside the wire 2.5 mmmm from the surface.

A 2.1 mm -diameter copper wire carries a 39 A
current (uniform across its cross section).

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