There are two and five in the zoo.
A:sheep; deer
B:sheep; giraffe
C: bears; deers
D:sheeps; tigers
在如图甲所示的电路中,电源电压保持6V 不变,R1的阻值为10Ω.闭合开关S,电压表的示数如图乙所示.
(1)求通过电阻R1的电流;
(2)求电阻R2的阻值.