(1)设:6V6W是L1,6V3W是L2.
P1=U²/R1
RI=6
P2=U²/R2
R2=12W
R1:R2=U1:U2
U1:U2=1:2
UI+U2=6
U1=2 U2=4
P1(实际)=U²/R1=0.67w
P2(实际)=U²/R2=1.33w
(2)Q=W=U²/R总.t=120J
(3)L1亮
(4)P1=U²/R1=1.5w
P2=U²/R2=1.33w
(1)设:6V6W是L1,6V3W是L2.
P1=U²/R1
RI=6
P2=U²/R2
R2=12W
R1:R2=U1:U2
U1:U2=1:2
UI+U2=6
U1=2 U2=4
P1(实际)=U²/R1=0.67w
P2(实际)=U²/R2=1.33w
(2)Q=W=U²/R总.t=120J
(3)L1亮
(4)P1=U²/R1=1.5w
P2=U²/R2=1.33w