(b) At one instant, the two conductors in a long household extension cord carry equal 5.00-A currents in opposite directions. The two wires are 3.00 mm apart. Find the magnetic field 36.0 cm away from the middle of the straight cord, in the plane of the two wires. 2.3148e-9 X

(b) At one instant, the two conductors in a long household extension cord carry equal 5.00-A currents in opposite directions. The two wires are 3.00 mm apart. Find the magnetic field 36.0 cm away from the middle of the straight cord, in the plane of the two wires. 2.3148e-9 X

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 51P

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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 magnetic field 36.0 cm away from a long, straight wire carrying current
5.00 A is 2780 µT.
(a) At what distance is it 278 µT?
360
cm
(b) At one instant, the two conductors in a long household extension
cord carry equal 5.00-A currents in opposite directions. The two wires
are 3.00 mm apart. Find the magnetic field 36.0 cm away from the
middle of the straight cord, in the plane of the two wires.
2.3148e-9 X
How far is the point of interest from each wire? nT
(c) At what distance is it one-tenth as large?
113.8
v cm
(d) The center wire in a coaxial cable carries current 5.00 A in one
direction, and the sheath around it carries current 5.00 A in the
opposite direction. What magnetic field does the cable create at points
outside the cables?
nT

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