A very long hollow cylindrical coil with a cross-sectional area of 70 cm2 and the number of turns per meter of its length (n=4500) and an electric current of 5 amperes passes through it. The amount of magnetic energy stored in a length of 35 cm of this coil is equal to

A very long hollow cylindrical coil with a cross-sectional area of 70 cm2 and the number of turns per meter of its length (n=4500) and an electric current of 5 amperes passes through it. The amount of magnetic energy stored in a length of 35 cm of this coil is equal to

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter14: Inductance

Section: Chapter Questions

Problem 74AP: Two long, parallel wires cy equal currents in opposite directions. The radius of each wire is a, and...

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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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A very long hollow cylindrical coil with
a cross-sectional area of 70 cm2 and
the number of turns per meter of its
length (n=4500) and an electric
current of 5 amperes passes through it.
The amount of magnetic energy stored
in a length of 35 cm of this coil is equal
to

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