电路如图所示,R1=R2=R3=R5=10KΩ , R4=20KΩ , 输出电压 u o 为( ) 。
A.
ui1+ui2
B.
2ui1+ui2
C.
ui1+2ui2
D.
-(ui1+ui2)
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举一反三
【单选题】The two homogeneous rings in Figs. (a) and (d) and the two homogeneous disks in Figs. (b) and (c) have the same weight【图片】 and radius 【图片】. Force【图片】 is applied in Figs. (a) and (b). A moment【图片】 is a...
A.
The angular acceleration of the ring in Fig. (a) is equal to that of the disk in Fig. (b).
B.
The angular acceleration of the ring in Fig. (a) is equal to that of the disk in Fig. (c).
C.
The angular acceleration of the ring in Fig. (a) is equal to that of the ring in Fig. (d).
D.
The angular acceleration of the disk in Fig. (b) is equal to that of the ring in Fig. (d).