Magnetism and electromagnetism
THE STUDY of magnetism, with origins far back in history, was impelled by the urgent need for a compass to navigate with. Peter Peregrinus discovered in 1269 that lodestone had N and S poles like the earth and the first scientific book1 on magnetism was published in 1600. A knowledge of elementary magnetism and electromagnetism is fundamental for studying electrical machines and transformers. We shall accordingly look at some basic magnetic phenomena and then some essential laws of electromagnetism.
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