International Library of Technology · Scranton, International Textbook Co. · leaf 16
er experiment for demonstrating this action is tosuspend a small pith-ball by a silk thread from a support or bracket, as shown in Fig. 901.Such an apparatus is spoken of asan electric pendulum. If astatic charge of electricity bedeveloped on a glass rod by rub-bing it with silk, and the rod… … ELECTRICITY AND MAGNETISM. 1451 charges mutual repidsion will take place whenever they arebrought near each other. If a stick of sealmg-zvax^ elec-trified by being rubbed with fur, is approached to anotherpendulum, the same results will be produced—the ball willfly towards the wax, and after…
Electrical engineering
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