MagnetismW. J. Johnston Company, 1896 - 294 ページ |
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253 BROADWAY A. E. Kennelly Advanced Primers alignment Alternating Currents ampere ampere-turns apparatus armature attraction bar magnet called cause compass needle conducting loop conductor connected core current strength demagnetization diamagnetic direction disc dynamo E. J. Houston earth's flux earth's magnetism eddy currents electric current Electric Railway electrical book published Electro-Technical Series electromagnet employed ether streamings flux passing flux paths flux produced glass hardened steel helix horizontal illustrations iron filings ISOCLINIC LINES lines lodestone magnetic circuit magnetic flux magnetic force magnetic intensity magnetic needle magnetic pole magnetic properties magnetized bar magnetizing coils magnetizing current mass molecular magnets molecules motion netism north pole observed obtained paramagnetic particles permanent magnet Ph.D placed plate polar surfaces pole-pieces possess powerful magnetic practical repulsion rotation shown in Fig soft iron south magnetic pole south pole substances telegraphic telegraphic sounder tensity theory of magnetism tion variations W. J. Johnston Company watch yoke
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