St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 56
rrent,in amperes, can be read. In these the strength of currentis proportional to the angular defiedtions. The coils are made with a small resist-ance, so that the currentwill not be greatly reducedin strength in passingthrough them. 75. Voltametersmeasure the strength of acurrent by chemical… … 54 APPARATUS FOR PXECTRICAL MEASUREMENTS. given time aremeasured. (SeeStudy, ChapterXXI.) The copper voltam-eter measures theamount of copperdeposited in a giventime by the current.Fig. 72 shows oneform. The coppercathode is weighed before and after the current flows. The weight of copper deposited…
Electricity
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