Electricity and magnetism for advanced students (1920)
Starling, Sydney George, 1873- · London Longmans, Green · leaf 237
226 ELECTRICITY AND MAGNETISM chap. It is not necessary to define either the thickness of the shell or theamount of pole per unit area of face, as the magnetic moment of unitarea of the shell is equal to the product of these two quantities; theshell is usually considered to be indefinitely thin.…
Electricity · Magnetism
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