[Electric engineering.] . Fig. 18. a multicircuit arrangement 30 ELECTRIC LIGHTING. 18 are connected directly in series, we have 500 volts acrossthe circuit. In the second case, we have the state of affairs shown inFig. 19 (b). Suppose that we take the point 1 as a startingpoint and assume that it is at zero potential. The arma-ture section A raises the pressure to 250 volts, so that thereis a difference in pressure of 250 volts between points 3 and current then passes through the circuit 3—4 containing.

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