phynx Posted January 22, 2013 Report Share Posted January 22, 2013 Daca am doua acumulatoare cu tensiunile electromotoare 12(rezistenta interna 1) si 24(rezistenta interna 2) volti si le leg in serie, iar pe circuit am un rezistor de 197 ohmi, rezistorul avand rezistenta destul de mare pentru acumulatoare pe circuit iese o intensitate foarte mica? Sau gresesc? Mi-a iesit aprox 0,09 ohmi.. Quote Link to comment Share on other sites More sharing options...
takko Posted January 22, 2013 Report Share Posted January 22, 2013 cum ai facut calculul? Quote Link to comment Share on other sites More sharing options...
takko Posted January 22, 2013 Report Share Posted January 22, 2013 I=E/(r+R) deci tu ai U = 36 v si r+R = 200 ohm de unde I= cu 36/200 => I = 0.18 Amperi Quote Link to comment Share on other sites More sharing options...
phynx Posted January 22, 2013 Author Report Share Posted January 22, 2013 (edited) Kirkoff? E1+ E2 = I(R+r1+r2).. Dar nu sunt sigur.. Adica nu inteleg fenomenul.. A.. da am vazut.. Prima oara am facut E1+E2 = I(R+r1) + I(R+r2).. Multumesc!Imi dai si mie o mana de ajutor si cu asta?http://imageshack.us/photo/my-images/20/12623477.png/O imparti pe doua parti.. Calculai rezistorii in paralel si apoi rezultatul il pusai in serie cu primul .. Dar iaras nu stiu daca e bine.. Edited January 22, 2013 by phynx Quote Link to comment Share on other sites More sharing options...
takko Posted January 22, 2013 Report Share Posted January 22, 2013 (edited) E legea lui Ohm pentru intreg circuitul .Cu placerePai si rezistori aia nu au si ei niste valori?Teoretic cele in paralel ar fi 1/r +1/r si rezultatul il aduni cu rezistorul in serie si iti da rezistenta totala Edited January 22, 2013 by takko Quote Link to comment Share on other sites More sharing options...
totti93 Posted January 23, 2013 Report Share Posted January 23, 2013 De fapt nu 1 / R + 1 / R, ci 1 / (1 / R + 1 / R).Formula e 1 / R = SUM (i = 0; i < n) {1 / Ri}Rezultatul obtinut aduni cu rezistenta legata in serie. Quote Link to comment Share on other sites More sharing options...
phynx Posted January 23, 2013 Author Report Share Posted January 23, 2013 Rezistorii au aceasi rezistenta.. Iti da rezistenta pe intreg circuitul si trebuie sa afli rezistenta unui rezistor. Quote Link to comment Share on other sites More sharing options...
Cyupi Posted January 23, 2013 Report Share Posted January 23, 2013 @phynx :Spune-ne si noua cat ai obtinut. Quote Link to comment Share on other sites More sharing options...
phynx Posted January 23, 2013 Author Report Share Posted January 23, 2013 @phynx :Spune-ne si noua cat ai obtinut.Nu mai face pe inteligentul.. Doar am enuntat problema pentru ca mai sus takko intreaba:Pai si rezistori aia nu au si ei niste valori?Mi-a dat 60 ohmi. Am rezolvat-o pana la urma. Multumesc oricum. Quote Link to comment Share on other sites More sharing options...
