滑线电桥的灵敏度及由此而产生的误差

The Sensitivity and Error of Slide Bridge

本文着重讨论了滑线电桥的灵敏度及其对所测电阻 R_(?)的影响。从理论上给出了最小相对误差的条件,即要使电桥灵敏度所导致的相对误差最小,电桥平衡点的位置取决于待测电阻和检流计内阻的比值。

In this paper,the sensitivity of slide bridge and its influence on the measured electric resis-tance R_x are discussed.The condition of the minimum relative error is theoretically given.That is theplace of balance point should be chosen according to the ratio of the measured resistance to the inter-nal resistance of the galvanometer.