Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 50
verge and when testedwill be found to be negativelycharged. If the deflection observedin the leaves of the electroscope is too small for purposes of demon-stration, the conditions can be bettered by using a battery of fromfive to ten cells instead of the single cell. If, however, the plates Aand B… … Fig. 38. Showing Existence of StaticCharges on Plates of Galvanic Cell. 40 ELECTRICITY AND MAGNETISM 31 and the zinc to A in the above experiment, the electroscope will befound to be positively charged. This shows clearly that the copperplate possesses a positive electrical charge, while the zinc…
Electrical engineering
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