Figure (a) shows a length of wire carrying acurrent i and bent into a circular coil of oneturn. In Figure (b) the same length of wirehas been bent to give a coil of 5 turns, eachof 1/5 the original radius. (a) If Bå and B₂are the magnitudes of the magnetic fieldsat the centers of the two coils, what is theratio Bb/Ba? (b) What is the ratio µ/μg, ofthe dipole moment magnitudes of thecoils?C(a)(b)

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Answered: are the magnitudes of the magnetic…

are the magnitudes of the magnetic fields at the centers of the two coils, what is the ratio Bb/Ba? (b) What is the ratio μb/μg, of

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

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Chapter11: Magnetic Forces And Fields

Section: Chapter Questions

Problem 109CP: A long-rigid wire lies along the x-axis and cairns a current of 2.5 A in the positive x-direction....

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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

Figure (a) shows a length of wire carrying a
current i and bent into a circular coil of one
turn. In Figure (b) the same length of wire
has been bent to give a coil of 5 turns, each
of 1/5 the original radius. (a) If Bå and B₂
are the magnitudes of the magnetic fields
at the centers of the two coils, what is the
ratio Bb/Ba? (b) What is the ratio µ/μg, of
the dipole moment magnitudes of the
coils?
C
(a)
(b)

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