In the figure below, four long straight wires are perpendicular to the page, and their cross-sections form a square of edge length a = 20 cm. The currents are out of the page in wires 1 and 4 and into the page in wires 2 and 3, and each wire carries 20 A. а a a a)What is the direction of the net magnetic field in the center of the square? O horizontally right O horizontally left O out of the page O into the page O vertically downward O vertically upward b) What is the magnitude of the magnetic field in the center of the square?

In the figure below, four long straight wires are perpendicular to the page, and their cross-sections form a square of edge length a = 20 cm. The currents are out of the page in wires 1 and 4 and into the page in wires 2 and 3, and each wire carries 20 A. а a a a)What is the direction of the net magnetic field in the center of the square? O horizontally right O horizontally left O out of the page O into the page O vertically downward O vertically upward b) What is the magnitude of the magnetic field in the center of the square?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 25P: A long, straight, horizontal wire carries a left-to-right current of 20 A. If the wire is placed in...

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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

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In the figure below, four long straight wires are perpendicular to the page, and their cross-sections form a square of edge length a = 20 cm. The currents are out of the page in wires 1 and 4 and into the page in wires 2 and 3, and each
wire carries 20 A.
а
a
a
a)What is the direction of the net magnetic field in the center of the square?
O horizontally right
O horizontally left
O out of the page
O into the page
O vertically downward
O vertically upward
b) What is the magnitude of the magnetic field in the center of the square?

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