The magnetic field inside a wire of radius R, carrying total current I is given byHOIB(r) = ³.2TR²What is the magnitude of the current density inside the wire that produces this magnetic field?○ J (r) =ITR²○ J(r) =412π Rª○ J (r)512TR³○ J (r)312TR³-22·73·P

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The magnetic field inside a wire of radius R, carrying total current I is given by B(r) HoI 2π R¹ -p³ 8. What is the magnitude of the current density inside the wire that produces this magnetic field? O J (r) TR² O J(r) 41 2 2TR² O J (r) 51 3 O J(r) = = 2TR³ 31 2TR³ ·7⁰

The magnetic field inside a wire of radius R, carrying total current I is given by B(r) HoI 2π R¹ -p³ 8. What is the magnitude of the current density inside the wire that produces this magnetic field? O J (r) TR² O J(r) 41 2 2TR² O J (r) 51 3 O J(r) = = 2TR³ 31 2TR³ ·7⁰

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter30: Magnetic Fields And Forces

Section: Chapter Questions

Problem 88PQ

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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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The magnetic field inside a wire of radius R, carrying total current I is given by
HOI
B(r) = ³.
2TR²
What is the magnitude of the current density inside the wire that produces this magnetic field?
○ J (r) =
I
TR²
○ J(r) =
41
2π Rª
○ J (r)
51
2TR³
○ J (r)
31
2TR³
-22
·73
·P

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