I1=U1/R1=6V/型雀30Ω=0.2A
(2)根据并联电路电顷租笑流的关雀含系可知：
I2=I-I1=0.8A-0.2A=0.6A
R2=U2/I2=6V/0.6A=10Ω
(3)由W1=U1I1t得：
t=W1/U1I1=30J/(6VX0.2A)=25s
W2=U2I2t=6Vx0.6Ax25s=90J
(1)电路并联，U=U1=U2
I1=U1/R1=6/30=0.2A
(2)I2=I-I1=0.8-0.2=0.6A
R2=U2/冲禅I2=6/0.6=10欧吵山
(3)W1=U1I1t
t=W1/U1I1=30/升判中(6X0.2)=25s
W2=U2I2t=6x0.6x25=90J
U/R=0.8 R为总电阻R=U/0.8=7.5欧姆
1/30+1/R2=1/喊歼7.5 R=1(1/7.5-1/祥渗腊30)=10欧姆
R1电流=U/R1=6/30=0.2A
0.2Ut=30J t=30/0.2U=25s
总电能=0.8剩谨滑以25剩以6=IUt=120J
W2=120-30=90J
I1=U/扒芦R1=6/或此桥30A=0.2A
R2=U/(IA-I1)=6/(0.8-0.2)A=10欧
W1=UUt/R1，W2=UUt/衫猛R2
W1/W2=R2/R1
30/W2=10/30
W2=50J