问题
计算题
电阻R1、R2串连接在电路中,R1两端的电压为3伏,R2两端的电压为9伏,R1+R2=600欧,求:
(1)电路总电压;
(2)电路中的电流;
(3)电阻R1和R2的阻值,
答案
(1)电路电压U=U1+U2=3V+9V=12V.
(2)R总=R1+R2=600Ω;
电路总电流I==
=0.02A.
(3)R1==
=150Ω,R2=
=
=450Ω.
电阻R1、R2串连接在电路中,R1两端的电压为3伏,R2两端的电压为9伏,R1+R2=600欧,求:
(1)电路总电压;
(2)电路中的电流;
(3)电阻R1和R2的阻值,
(1)电路电压U=U1+U2=3V+9V=12V.
(2)R总=R1+R2=600Ω;
电路总电流I==
=0.02A.
(3)R1==
=150Ω,R2=
=
=450Ω.