April 2011
Intermediate to advanced
1128 pages
25h 6m
English
book
Electrical Engineering: Know It All
by Clive Maxfield, John Bird, Tim Williams, Walt Kester, Dan Bensky
Content preview from Electrical Engineering: Know It All
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Chapter 21
Magnetic Fields
Ron Schmitt
Magnetic fields are inherently different and more difficult to grasp than electric fields. Whereas electric fields emanate directly from individual charges, magnetic fields arise in a subtle manner because there are no magnetic charges. Moreover, because there are no magnetic charges, magnetic field lines can never have a beginning or an end. Magnetic field lines always form closed loops. You may have heard that some particle physicists have been searching for magnetic charges (or “magnetic monopoles,” as the particle physicists call them) in high-energy experiments. In fact, many unified theories of physics require such particles. However, at this point such particles have not been found. Even if they were ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.