双臂电桥平衡时Rx=(R1/R2)Rn成立的条件是什么？ 双臂电桥平衡时Rx=(R2/R1)Rn成立的条件是什么?
\u53cc\u81c2\u7535\u6865\u5e73\u8861\u65f6Rx=(R1/R2)Rn\u6210\u7acb\u7684\u6761\u4ef6\u662f\u53cc\u81c2\u7535\u6865\u5e73\u8861\u65f6,\u901a\u8fc7\u7075\u654f\u7535\u6d41\u8ba1\u7684\u7535\u6d41\u4e3a0
Uab=Uac Ubd=Ucd Ig=0
I1R1=I2R2 I1Rn=I2Rx
R1/R2=Rn/Rx
Rx=(R1/R2)Rn
\u95ee\u9898\u672c\u8eab\u6709\u95ee\u9898\u3002
双臂电桥平衡时
Uab=Uac Ubd=Ucd Ig=0
I1R1=I2R2 I1Rn=I2Rx
R1/R2=Rn/Rx
Rx=(R1/R2)Rn
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绛旓細RX=RnR2/R1
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