For a toroidal solenoid with the average circumference L =10 cm and 200 coils, the current is 100 mA. (1) If it is filled with the vacuum find the magnetic field intensity H and the magnetic induction intensity B0  , respectively. (2) If it is filled with magnetic materials and the relative permeability is  r =4200, find the H and B again.

For a toroidal solenoid with the average circumference L =10 cm and 200 coils, the current is 100 mA. (1) If it is filled with the vacuum find the magnetic field intensity H and the magnetic induction intensity B0  , respectively. (2) If it is filled with magnetic materials and the relative permeability is  r =4200, find the H and B again.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 64P: A solenoid with an iron core is 25 cm long and is wrapped with 100 turns of wire. When the current...

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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

For a toroidal solenoid with the average circumference L =10 cm and 200 coils, the current is

100 mA. (1) If it is filled with the vacuum find the magnetic field intensity H and the magnetic

induction intensity B0  , respectively. (2) If it is filled with magnetic materials and the relative

permeability is  r =4200, find the H and B again.

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