The Sensitivity of Wheatstone-Bridge and the Data Processing while Exchanging the Bridge Arm Resistance

The conception of electric bridge sensitivity and the data processing method in the Wheatstone-Bridge experiment are introduced in this paper.It is pointed that the electric bridge sensitivity changes when exchanging the bridge arm resistance.The two measure results from exchang-ing the arm resistance have different confidence,and they should be identified with the unequal precision measurement values.The synthesizing method should follow the unequal precision measurement values principle.