4. British physicist James Clerk Maxwell (1831-1879) showed mathematically that light was a propagating wave of electric and magnetic fields. Reminder: €, = 8.854 x 10-¹2 C²/(Nm²), Ho = 1.256 x 10-6 N/A², and the speed of light is c = 3 x 108 m/s. a. The average magnetic field due to sunlight at the equator is B = 2 x 10-6 T. Determine the average magnetic energy density at the equator. (*) b. In an electromagnetic wave the magnitude of the electric field is equal to the magnetic field multiply by the speed of light: E = CB. Determine the average electric energy density at the equator.

4. British physicist James Clerk Maxwell (1831-1879) showed mathematically that light was a propagating wave of electric and magnetic fields. Reminder: €, = 8.854 x 10-¹2 C²/(Nm²), Ho = 1.256 x 10-6 N/A², and the speed of light is c = 3 x 108 m/s. a. The average magnetic field due to sunlight at the equator is B = 2 x 10-6 T. Determine the average magnetic energy density at the equator. (*) b. In an electromagnetic wave the magnitude of the electric field is equal to the magnetic field multiply by the speed of light: E = CB. Determine the average electric energy density at the equator.

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

4. British physicist James Clerk Maxwell (1831-1879) showed mathematically that light was a propagating wave of
electric and magnetic fields. Reminder: €, = 8.854 x 10-12 C²/(Nm²), Mo = 1.256 x 10-6 N/A², and the speed
of light is c = 3 x 108 m/s.
a. The average magnetic field due to sunlight at the equator is B = 2 x 10-6 T. Determine the average magnetic
energy density at the equator.
b. In an electromagnetic wave the magnitude of the electric field is equal to the magnetic field multiply by the
speed of light: E = CB. Determine the average electric energy density at the equator.
Note this relation between E and B is only true in a propagating electromagnetic wave leading to the same
electric and magnetic energy density. This is not true for general electric and magnetic fields.

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