A text-book of physics, largely experimental. On the Harvard college "Descriptive list of elementary physical experiments." (1891)
Hall, Edwin Herbert, 1855-1938, Bergen, Joseph Y. (Joseph Young), 1851-1917 · New York, H. Holt and Company · leaf 541
twill be seen, from what is said in § 400, that all the sectionstend to rotate in the same direction, that is, clockwise.But the only way the sections have of rotating is to turnthe whole armature about its axis, and this they do. 516 PHYSICS. The form of armature shown in Fig. 282 is called a… … Fig. 283. 283. This form is called a drum armature. The principleof the two forms is the same. EXPERIMENT.Show in operation upon the lecture-table a small motor of indus-trial form. EXERCISE 60.ELECTRIC MOTOR. Put together, assemble, the parts of a small electric motor, tobe driven by a single…
Physics
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