. Practical physics. the third, etc., the copper of the first and thezinc of the last being joined to the ends of the external resist-ance (see Fig. 287). The E.M.F. of such a combination is thesum of the E.^NI.F.s of the single cells.The internal resistance of the combina-tion is also the sum of the internal resist-ances of the single cells. Hence, if theexternal resistances are very small, thecurrent furnished by the combination willbe no larger than that furnished by a singlecell, since the total resistance of the circuithas been increased in the same ratio as thetotal E.M.F. But if the ext
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. Practical physics. the third, etc., the copper of the first and thezinc of the last being joined to the ends of the external resist-ance (see Fig. 287). The E.M.F. of such a combination is thesum of the E.^NI.F.s of the single cells.The internal resistance of the combina-tion is also the sum of the internal resist-ances of the single cells. Hence, if theexternal resistances are very small, thecurrent furnished by the combination willbe no larger than that furnished by a singlecell, since the total resistance of the circuithas been increased in the same ratio as thetotal E.M.F. But if the ext