A 20.0 m long string of Christmas lights has two wires twisted around each other 0.00234 m apart. One carries 3.47 A of current toward the tree and the other carries the same current away from the tree. What is the (+) magnitude of the magnetic force between the wires? [?]N

A 20.0 m long string of Christmas lights has two wires twisted around each other 0.00234 m apart. One carries 3.47 A of current toward the tree and the other carries the same current away from the tree. What is the (+) magnitude of the magnetic force between the wires? [?]N

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 37P: The potential difference V(t) between parallel plates shown above is instantaneously increasing at a...

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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

A 20.0 m long string of Christmas lights
has two wires twisted around each other
0.00234 m apart. One carries 3.47 A of
current toward the tree and the other
carries the same current away from the
tree. What is the (+) magnitude of the
magnetic force between the wires?
[?]N
Force (N)

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