Dane: Uz=9V R1=6,6Ohm R2=10Ohm R3=30Ohm R4=60Ohm Oblicz: Rz=? I1,I2,I3,I4=? U1,U2,U3,U4=? P1.P2,P3,P4=? Rozwiązanie: [latex]Rz=R1+frac{Rz_{2-3}*R4}{Rz_{2-3}+R4}[/latex] [latex]Rz=6,6+frac{(10+30)*60}{10+30+60}[/latex] [latex]Rz=6,6+frac{40*60}{100}[/latex] [latex]Rz=6,6+frac{2400}{90}[/latex] [latex]Rz=6,6+24[/latex] [latex]Rz=30,6Omega[/latex] [latex]I=frac{Uz}{Rz}[/latex] [latex]I=frac{9}{30,6}[/latex] [latex]Iapprox0,294A[/latex] [latex]I=I1[/latex] [latex]U1=I1*R1[/latex] [latex]U1=0,294*6,6[/latex] [latex]U1=1,9404[/latex] [latex]U_{1-2},U4=Uz-U1[/latex] [latex]U_{1-2},U4=9-1,9404[/latex] [latex]U_{1-2},U4=7,0596V[/latex] [latex]U4=7,0596V[/latex] [latex]I4=frac{U4}{R4}[/latex] [latex]I4=frac{7,0596}{60}[/latex] [latex]I4=0,11766A[/latex] [latex]I2,I3=frac{U_{2-3}}{Rz_{2-3}}[/latex] [latex]I2,I3=frac{7,0596}{10+30}[/latex] [latex]I2,I3=frac{7,0596}{40}[/latex] [latex]I2,I3=0,17649A[/latex] [latex]U2=I2*R2[/latex] [latex]U2=0,17649*10[/latex] [latex]U2=1,7649V[/latex] [latex]U3=I3*R3[/latex] [latex]U3=0,17649*30[/latex] [latex]U3=5,2947V[/latex] [latex]P1=U1*I1[/latex] [latex]P1=1,9404*0,294[/latex] [latex]P1approx0,5705W[/latex] [latex]P2=U2*I2[/latex] [latex]P2=1,7649*0,17649[/latex] [latex]P2approx0,315W[/latex] [latex]P3=U3*I3[/latex] [latex]P3=5,2947*0,17649[/latex] [latex]P3approx0,934W[/latex] [latex]P4=U4*I4[/latex] [latex]P4=7,0596*0,11766[/latex] [latex]P4approx0,831W[/latex]
