(1)P=U*U/R R1=U1*U1/P1=6*6/3=12欧姆 R2=U2*U2/P2=6*6/6=6欧姆 R1:R2=12:6=2:1
(2)I=U/R=12/(12+6)=2/3 A
(3)P=I*I*R P1=16/3W P2=8/3W P1:P2=2:1
(1)P=U*U/R R1=U1*U1/P1=6*6/3=12欧姆 R2=U2*U2/P2=6*6/6=6欧姆 R1:R2=12:6=2:1
(2)I=U/R=12/(12+6)=2/3 A
(3)P=I*I*R P1=16/3W P2=8/3W P1:P2=2:1