Advanced theory of electricity and magnetism; A text-book for colleges and technical schools (1915)
Franklin, William S. (William Suddards), 1863-1930, MacNutt, Barry, 1878-1936. joint author · New York, Macmillan · leaf 50
Fig. 32. … Fig. 33. Consider any magnetic field whatever, and imagine a surfaceor shell BB which is everywhere at right angles to the fieldas shown in Fig. 33. Imagine the surface BB to be dividedup into small squares such that one unit of magnetic flux crosseseach square, and imagine lines of force to be…
Electricity · Magnetism
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