Question

1、将标有“6V3W”字样的小灯泡L1与额定电压为12V的小灯泡L2并连接在电源上,L1正常发光,L2较暗,

Answer 1

I=P/u=3/6=0.5A,I2=I-I1=1.1A-0.5A=0.6A,R2=U/I=6v/0.6A=10欧,R1=U2/P=6*6/3=12欧,U=i(R1+R2)=0.5(12+10）=11v,p2=i2R=.05*.05*10=2.5W