(1)I=P灯/U灯=3W/6V=0.5A
U1=U-UL=9V-6V=3V
R1=U1/I=3V/0.5A=6Ω
(2)I1=U/R1=9V/6Ω=1.5A
I变=U/(R变/2)=9V/6Ω=1.5A
I=I1+I变=1.5A+1.5A=3A
希望对您有所帮助!
(1)I=P灯/U灯=3W/6V=0.5A
U1=U-UL=9V-6V=3V
R1=U1/I=3V/0.5A=6Ω
(2)I1=U/R1=9V/6Ω=1.5A
I变=U/(R变/2)=9V/6Ω=1.5A
I=I1+I变=1.5A+1.5A=3A
希望对您有所帮助!