Two parallel wires that are 4 cm apart are carry currents of 2A and 4A respectively, in the same direction. The force per unit length in N/m of one wire on the other is:( 1 × 10-3, repulsive; 1 × 10-3, attractive; 4 × 10-5, repulsive; 4 × 10-5, attractive; none of these.)

Two parallel wires that are 4 cm apart are carry currents of 2A and 4A respectively, in the same direction. The force per unit length in N/m of one wire on the other is:( 1 × 10-3, repulsive; 1 × 10-3, attractive; 4 × 10-5, repulsive; 4 × 10-5, attractive; none of these.)

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 32P: Two long, parallel wires are hung by cords of length 5.0 cm, as shown in the accompanying figure....

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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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