lecture23 - Physics 2102 Gabriela Gonzlez James Clerk...

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Maxwell’s equations the dawn of 20th century physics James Clerk Maxwell (1831-1879) Physics 2102 Gabriela González
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Gauss’ Law: charges produce electric fields, field lines start and end in charges = S q dA E 0 / ε S S S S
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Gauss’ law for magnetism: field lines are closed or, there are no magnetic monopoles = S dA B 0 S S
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Ampere’s law: electric currents produce magnetic fields = C i ds B 0 μ C
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Faraday’s law: changing magnetic fields produce (“induce”) electric fields - = S C dA B dt d ds E
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All together: = S q dA E 0 / ε = S dA B 0 = C i ds B 0 μ - = S C dA B dt d ds E
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= S dA E 0 = S dA B 0 = C ds B 0 - = S C dA B dt d ds E No charges or currents : …very suspicious…! ? q =0 i =0 = S q dA E 0 / ε i C 0 μ
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Something is not right… If we are charging a capacitor, there is a current left and right of the capacitor. Thus, there is the same magnetic field right
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This note was uploaded on 11/18/2011 for the course PHYSICS 2102 taught by Professor Dowling during the Fall '10 term at LSU.

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lecture23 - Physics 2102 Gabriela Gonzlez James Clerk...

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