The Experimental Investigations for Wheatstone Bridge′s Sensitivity
Sun Jun-xia · 2008
Wheatstone bridge′s sensitivity is regarded as a key factor to affect its measuring precision.The experimental investigations for the Wheatstone bridge′s sensitivity were carried out in this paper.After carrying out Wheatstone bridge,plenty of observations were obtained and the relation between the maximum bridge sensitivity Smax and the proportional coefficient r.The result shows that bridge sensitivity Smax gradually increases as the ratio coefficient r increases.Therefore,it is important and maneuverable for us to choose the experimental parameters,to enhance the measured accuracy of electric resistance,and to obtain the largest sensitivity,which provide a reliable warrant for measuring the electric resistance using Wheatstone bridge.