串联电路的电流:I=6/(R1+R2)=6/(5+15)=0.3A
R1两端的电压:U1=R1/(R1+R2)×6=5/(5+15)×6=1.5V;
R2两端的电压:U2=R2/(R1+R2)×6=15/(5+15)×6=4.5V;
R1消耗的功率:P1=U1×I=1.5×0.3=0.45W;
R2消耗的功率:P2=U2×I=4.5×0.3=...
串联电路的电流:I=6/(R1+R2)=6/(5+15)=0.3A
R1两端的电压:U1=R1/(R1+R2)×6=5/(5+15)×6=1.5V;
R2两端的电压:U2=R2/(R1+R2)×6=15/(5+15)×6=4.5V;
R1消耗的功率:P1=U1×I=1.5×0.3=0.45W;
R2消耗的功率:P2=U2×I=4.5×0.3=...