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Inoppositiontothemetalconductivity,theresistanceofelectrolyteisdecreas-
ingwhentemperatureisgrowingup.Itisbecausethedissociationdegreeαis
changed.Thisprocessisstronglynonlinear.Thefollowingfigure(Fig.1.7)illus-
tratesthedissociationdegreeversustemperature
t
.
Fig.1.7.Dissociationdegreeversustemperature
Inthecaseofbattery,asasourceofDCvoltage,itisimportanttonotethatits
internalresistanceislowinminesCelsiusandhighinplusCelsiustemperature.
Ofcourse,becausethisdependenceisnonlinearwhenthetemperatureexceeds
overτnominalthebatteryinternalresistanceisincreasedbecausetakesplacetoo
strongrecombinationprocess.
Theresistorsaspassiveelectriccircuitelementscanbeconnectedintwobasic
ways:seriesandparallel(Fig.1.8).Thecombinationofthatcreatesstaranddelta
(triangle)connections.
Fig.1.8.Basicresistorconnections:a)series,b)parallel
IntheFig.1.8b),pointsCandDmeansthecurrentnodes.NumbersIandII
depictthevoltageloops.
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