Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 595
ironj,jg ^gg frame-work, the two opposite edges of theiron being north and south poles when the current is passing.The inner coil is furnished with a commutator, whichreverses the current assoon as opposite polesof the inner and outercoils are opposed. Arepresents the outercoil of wires, B onepole…
Physics
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