The current north magnetic pole is near the geographic North Pole, but they are not exactly the same place. Compasses point towards the north magnetic pole. How does a compass needle help people find the direction that they are going.

The current north magnetic pole is near the geographic North Pole, but they are not exactly the same place. Compasses point towards the north magnetic pole. How does a compass needle help people find the direction that they are going.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 63P: A current of 1.5 A flows through the windings of a large, thin toroid with 200 turns per meter. If...

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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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