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Unformatted text preview: PHYSICS 002C Lecture 10 April 20, 2009 Serway and Jewett Chapter 24 Electromagnetic Waves Review - Chap 24.1 Displacement current The sources of the electric field are electric charges magnetic pole currents Sorry, no magnetic monopoles changing magnetic fields The sources for the magnetic field are magnetic poles Sorry, no magnetic monopoles conduction currents changing electric fields (= displacement currents) Q: Does the magnetic field outside a long solid cylindrical conductor carrying an ac current ) sin( t kx I I - = show a change as one passes a gap in the conductor narrower than a wavelength? a) yes; b) no; c) cant tell; d) depends on the conductor; e) why? The reality of the fields is an empirical fact because of the finite speed of light. Review - Chap 24.2 Maxwells equations = / Q A d E Coulomb-Gauss law = A d B No magnetic monopoles!...
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