Предмет: Физика, автор: Аноним

Помогите найти токи в цепи

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Ответы

Автор ответа: 111ig111
0
так как эквиваленты 4,5 и 6,7 найдены , то продолжу
r23=R2*R3/(R2+R3)=20*30/(20+30)=12 Ом
r45678=r45+r67+R8=24+25+40=89 Ом
r2345678=r45678*r23/(r2345678+r23)=89*12/(89+12)=10.6Ом
Сопротивление всей цепи:
R=R1+r2345678=10+10.6=20.6 Ом
Ток всей цепи:
I=Ir1=Ir2345678=E/R=110/20.6=5.34 A
Ur1=I*R1=5.34*10=53.4V
Ur2=Ur3=E-Ur1=110-53.4=56.6V
Ir2=Ur2/R2=56.6/20=2.83A
Ir3=Ur3/R3=56.3/30=1.88A
Ir2+Ir3=2.83+1.88=4.71
Ir45678=I-(Ir2+Ir3)=5.34-4.71=0.63A
Ur8=Ir45678*R8=0.63*40=25.2V
Ur45=Ir45678*r45=24*0.63=15.12V
Ir4=Ur45/R4=15.12/40=0.378A
Ir5=Ur45/R5=15.12/60=0.252A
Ur67=Ir45678*r67=0.63*25=15.75V
Ir6=Ur67/R6=15.75/50=0.315A
Ir7=Ur67/R7=15.75/50=0.315A
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