17- chapter30-question25 A long straight wire (diameter r=2.0 mm) carries a current of 30 A. What is the magnitude of the magnetic field (in mT) at a point that is2.5 mm from the axis of the wire ? He= 4m x 10 T.m/A. Option1 Option2 Option3 Option4 Options 3.2 28 3.6 3.0 24 a) Option5

17- chapter30-question25 A long straight wire (diameter r=2.0 mm) carries a current of 30 A. What is the magnitude of the magnetic field (in mT) at a point that is2.5 mm from the axis of the wire ? He= 4m x 10 T.m/A. Option1 Option2 Option3 Option4 Options 3.2 28 3.6 3.0 24 a) Option5

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter30: Sources Of The Magnetic Field

Section: Chapter Questions

Problem 30.4CQ: A hollow copper tube carries a current along its length. Why is B = 0 inside the tube? Is B nonzero...

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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.

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