A History of Electricity and Magnetism | Date: 23 May 2011, 02:03
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Product Description: Written so as to be understood by the non-technical reader who is curious about the origin of all the electrical and electromagnetic devices that surround him, this history also provides a convenient compendium of information for those familiar with the electrical and magnetic fields. The book moves along at a rapid pace, as it must if it is to cover the enormous proliferation of developments that have occurred during the last hundred years or so. The author has struck a workable balance between the human side of his story, introducing those biographical details that help advance it, and its technical side, explaining theories and "how things work" where this seems appropriate. He also achieves a balance in recounting the discovery of basic scientific principles and their technological applications—the myriad of devices and inventions that utilize energy and information in electromagnetic form. Indeed, one of the important themes of the book is the close and reciprocal relationship between science and technology, between theory and practice. Before approximately 1840, the purely scientific investigations of electrical and magnetic phenomena were largely ad hoc and observational, and essentially no technology based on them existed. Afterwards, the scientific explorations became more programmatic and mathematical, and technical applications and inventions began to be produced in great abundance. In return, this technology paid its debt to pure science by providing it with a series of measuring instruments and other research devices that allowed it to advance in parallel. Although this book reviews the early discoveries, from the magnetic lodestone and electrostatic amber of antiquity to Galvani's frog's legs and Franklin's kite-and-key of the 1700s, its major emphasis is on the post-1840 developments, as the following chapter titles will confirm: Early Discoveries—Electrical Machines and Experiments with Static Electricity—Voltaic Electricity, Electrochemistry, Electromagnetism, Galvanometers, Ampere, Biot and Savart, Ohm—Faraday and Henry—Direct Current Dynamos and Motors—Improvements in Batteries, Electrostatic Machines, and Other Older Devices—Electrical Instruments, Laws, and Definitions of Units—The Electric Telegraph—The Atlantic Cable—The Telephone—Electric Lighting—Alternating Currents—Electric Traction—Electromagnetic Waves, Radio, Facsimile, and Television—Microwaves, Radar, Radio Relay, Coaxial Cable, Computers—Plasmas, Masers, Lasers, Fuel Cells, Piezoelectric Crystals, Transistors—X-Rays, Radioactivity, Photoelectric Effect, Structure of the Atom, Spectra.
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