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Concepts in Physics-Lecture 18 Electromagnetism spring 2008-Physics

Concepts In Physics

Post: January 14th, 2012
Description
A changing magnetic field produces an electric field, and a changing electric field produces a magnetic field.Electromagnetism, Electromagnetic Induction, Electromagnetic Waves, Magnetic fields, Electromagnets, Induced Current, Induced Current, Electromagnetic Spectrum, FCC, Radio Waves, Polarization, Waves, Radio Waves, time-varying,  frequency, frequency-space, wavelength, media, international allocation, propagation, radiation, Murphy, Concepts in Physics
A changing magnetic field produces an electric field, and a changing electric field produces a magnetic field.Electromagnetism, Electromagnetic Induction, Electromagnetic Waves, Magnetic fields, Electromagnets, Induced Current, Induced Current, Electromagnetic Spectrum, FCC, Radio Waves, Polarization, Waves, Radio Waves, time-varying,  frequency, frequency-space, wavelength, media, international allocation, propagation, radiation, Murphy, Concepts in Physics
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Contents
Electromagnetism & EM Waves 05/19/08 UCSD Physics 10 UCSD Physics 10 Electromagnetism • Electricity and magnetism are different facets of electromagnetism – a moving electric charge produces magnetic fields – changing magnetic fields move electric charges James Clerk Maxwell Michael Faraday Electromagnetism Electromagnetic Induction Electromagnetic Waves • This connection first elucidated by Faraday, Maxwell • Einstein saw electricity and magnetism as framedependent facets of unified electromagnetic force unified electromagnetic Spring 2008 2 UCSD Physics 10 UCSD Physics 10 Magnetic fields from electricity • A static distribution of charges produces an electric field • Charges in motion (an electrical current) produce a motion (an magnetic field – electric current is an example of charges (electrons) in motion Electromagnets • Arranging wire in a coil and running a current through produces a magnetic field that looks a lot like a bar magnet – called ..

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