A copper rod of length 0.99 m is lying on a frictionless table (see the drawing). Each end of the rod is attached to a fixed wire by an unstretched spring that has a spring constant of k=71 N/m. A magnetic field with a strength of 0.22 T is oriented perpendicular to the surface of the table. (a) What must be the direction of the current in the copper rod that causes the springs to stretch? (b) If the current is 13 A, by how much does each spring stretch? (a) Direction TRER Table (top view) Fixed wires- (out of paper) Copper rod · DECHERS

A copper rod of length 0.99 m is lying on a frictionless table (see the drawing). Each end of the rod is attached to a fixed wire by an unstretched spring that has a spring constant of k=71 N/m. A magnetic field with a strength of 0.22 T is oriented perpendicular to the surface of the table. (a) What must be the direction of the current in the copper rod that causes the springs to stretch? (b) If the current is 13 A, by how much does each spring stretch? (a) Direction TRER Table (top view) Fixed wires- (out of paper) Copper rod · DECHERS

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 14OQ

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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

A copper rod of length 0.99 m is lying on a frictionless table (see the drawing). Each end of the rod is attached to a fixed wire by an
unstretched spring that has a spring constant of k =71 N/m. A magnetic field with a strength of 0.22 T is oriented perpendicular to the
surface of the table. (a) What must be the direction of the current in the copper rod that causes the springs to stretch? (b) If the current
is 13 A, by how much does each spring stretch?
(a) Direction
(b) Number
i
Units
FORTON
74
Table
(top view)
Fixed wires.
(out of paper)
-Copper rod
DONDE

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