Elec-Mag Waves - PHY 2049C General Physics B Fields Circuits Waves Light Today 1 Maxwell's equations 2 Waves of Fields Intro Maxwell's Equations

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PHY 2049C – General Physics B Fields, Circuits, Waves, Light Today: 1) Maxwell's equations 2) Waves of Fields
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Intro: Maxwell's Equations Congratulations! You have arrived at the point, where you know almost all principles of electricity and magnetism, just as scientists did in ~1870 ! Between 1800 and 1870 , scientists like Coulomb, Volta , Galvani , Faraday , Ampere, Oerstedt had been investigating electricity and magnetism. They had played with batteries, magnets, coils and had a lot of fun doing it . They had invented the idea of the electric and magnetic fields, the math that goes with it and things looked a bit complicated. ( Chapters 20-28 ) This is the state of Electricity and Magnetism before James Clerk Maxwell.
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Maxwell's Equations, Paperback Edition, Part 1 Part 1 about electric field lines; 1) Electric char ges are the beginning or end of field lines We also call charges the “source” (or drain) of the electric field. 2) Induction: A changing magnetic field creates electric field lines (Voltage) circling around the area of the field. This creates no source , but a “curl”. 2 0 1 4 Q E= r πε 1 2 B rt π ΔΦ Δ ( ) 2 induced rE V =
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Maxwell's Equations, Paperback Edition, Part 2 Part 2 about magnetic field lines; 3) There is no source of the magnetic field, no “magnetic charge” Magnetic field lines do not have beginning or end. (Still subject of speculation; Is there a magnetic monopole=magnetic “charge” particle? ) 4) Magnetic fields are “curling” around a moving charge or a changing electric field .
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This note was uploaded on 06/29/2010 for the course PHY2049C PHY2049C taught by Professor Duke during the Summer '10 term at FSU.

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Elec-Mag Waves - PHY 2049C General Physics B Fields Circuits Waves Light Today 1 Maxwell's equations 2 Waves of Fields Intro Maxwell's Equations

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