8-Consider two long, straight wires through which we run an electric current in opposite directions... Which of the following choices below best represents the force that one wire exerts on the other? (a) The magnetic force is attractive (b) The magnetic force is repulsive (c) The magnetic force is zero (d) Not enough information

8-Consider two long, straight wires through which we run an electric current in opposite directions... Which of the following choices below best represents the force that one wire exerts on the other? (a) The magnetic force is attractive (b) The magnetic force is repulsive (c) The magnetic force is zero (d) Not enough information

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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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

8-Consider two long, straight wires through which we run an electric current in
opposite directions... Which of the following choices below best represents the
force that one wire exerts on the other?
(a) The magnetic force is attractive
(b) The magnetic force is repulsive
(c) The magnetic force is zero
(d) Not enough information

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173% NASA and the military have long been interested in so-called “rail guns" to launch projectiles and payloads at very high velocities. A schematic of a rail gun is shown below, where there are two parallel rails separated by a distance d and connected to a powerful battery of voltage V, in a constant magnetic field B = Bok pointing out of the page. The projectile / payload can be modeled as a bar of mass m and resistance R which connects the two rails and completes the circuit. Assume the electrical resistance of the rails is negligible, but take there to be a constant force of kinetic friction with magnitude ƒ between the bar and the rails. (a) What is the current in the circuit when the bar is moving with velocity v? Remember to account for both the battery and the induced EMF. (b) What is the net force on the bar when it is moving with velocity v? (c) Using Newton's second law, F = ma, find a differential equation relating and v. (d) Verify that the solution to your differential…