The figure shows, in cross section, four thin wires that are parallel, straight, and very long. They carry identical currents of i = 3.65 A in the directions indicated. Initially all four wires are at distance d = 16.0 cm from the origin of the coordinate system, where they create a net magnetic field B. (a) To what value of x must you move wire 1 along the x axis in order to rotate B counterclockwise by 30°? (b) With wire 1 in that new position, to what value of x must you move wire 3 along the x axis to rotate B by 30° back to its initial orientation?

The figure shows, in cross section, four thin wires that are parallel, straight, and very long. They carry identical currents of i = 3.65 A in the directions indicated. Initially all four wires are at distance d = 16.0 cm from the origin of the coordinate system, where they create a net magnetic field B. (a) To what value of x must you move wire 1 along the x axis in order to rotate B counterclockwise by 30°? (b) With wire 1 in that new position, to what value of x must you move wire 3 along the x axis to rotate B by 30° back to its initial orientation?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter22: Magnetic Forces And Magnetic Fields

Section: Chapter Questions

Problem 45P

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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

The figure shows, in cross section, four thin wires that are parallel, straight, and very long. They carry identical currents of i = 3.65 A in
the directions indicated. Initially all four wires are at distance d = 16.0 cm from the origin of the coordinate system, where they create
a net magnetic field B. (a) To what value of x must you move wire 1 along the x axis in order to rotate B counterclockwise by 30°? (b)
With wire 1 in that new position, to what value of x must you move wire 3 along the x axis to rotate B by 30° back to its initial
orientation?
(a) Number
0.074
(b) Number i 0
Units
Units
d
m
m
d
d
d

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