Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 288
s, etc., are simply devices for producing andmaintaining an E. M. F. Some dynamos produce highE. M. F.s from 2000 to 10000 volts and even higher,while battery cells produce low E. M. F.s from 1 to 2volts only. To make the analogy between the water system andthe electrical system more correct, we… … Fig. 139. Simple Hydraulic Circuit with Gauges. Suppose now we turn on tap T and start the pumpworking, the pressure gauge will indicate a difference ofpressure in the circuit, and the current gauge will indi-cate a current, flowing round the circuit. In this case we are not generating water, we…
Electricity
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