Two parallel wires separated by 30 cm carry currents of 7 A in same directions. What is the magnetic field in the plane of the wires at a point that is 10 cm from one wire and 40 cm from the other? [Permeability of free space = 4n x 10-7 T.m/A] a. 3.50 x 10-8 T

Two parallel wires separated by 30 cm carry currents of 7 A in same directions. What is the magnetic field in the plane of the wires at a point that is 10 cm from one wire and 40 cm from the other? [Permeability of free space = 4n x 10-7 T.m/A] a. 3.50 x 10-8 T

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter24: Magnetic Fields

Section: Chapter Questions

Problem 83A

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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

Two parallel wires separated by 30 cm carry currents of 7 A in same
directions. What is the magnetic field in the plane of the wires at a point
that is 10 cm from one wire and 40 cm from the other? [Permeability of
free space = 4T x 10-7 T.m/A]
а. 3.50 х 10-8 Т
b. 1.75 x 10-7 T
С. 1.40 х 10-7T
d. 1.06 x 10-7 T

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