Электрическая цепь составлено из четырех кусков провода одной…

R=R1+R2+R3+R4 — полное сопротивление проводникаR1=pL/S1R2=pL/S2R3=pL/S3R4=pL/S4R=pL/S1+pL/S2+pL/S3+pL/S4=pL*(1/S1+1/S2+1/S3+1/S4) I=U/R=U/pL*(1/S1+1/S2+1/S3+1/S4) — сила тока в проводникеU1=I*R1=U*pL/S1*pL*(1/S1+1/S2+1/S3+1/S4)=U/S1*(1/S1+1/S2+1/S3+1/S4)=100/ 1*(1/1+1/2+1/3+1/4)=100/2,08=48 B U2=I*R2=U*pL/S2*pL*(1/S1+1/S2+1/S3+1/S4)=U/S2*(1/S1+1/S2+1/S3+1/S4)=100/ 2*(1/1+1/2+1/3+1/4)=24 B U3=I*R3=U*pL/S3*pL*(1/S1+1/S2+1/S3+1/S4)=U/S3*(1/S1+1/S2+1/S3+1/S4)=100/ 3*(1/1+1/2+1/3+1/4)=16 B U4=I*R4=U*pL/S4*pL*(1/S1+1/S2+1/S3+1/S4)=U/S4*(1/S1+1/S2+1/S3+1/S4)=100/ 4*(1/1+1/2+1/3+1/4)=12 B