單項選擇題

(2011)圖示兩電路相互等效,由圖b)可知,流經(jīng)10Ω電阻的電流IR=1A,由此可求得流經(jīng)圖a)電路中10Ω電阻的電流I等于:()

A.1A
B.-1A
C.-3A
D.3A