单臂电桥实验，接触电阻和引线电阻分别对测量结果有何影响？ 在用滑线电桥测电阻时"交换抵消法"可消除哪一类误差?各接触电...
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因为当待测电阻阻值很小时，测出的值，包含有桥臂间的引线电阻和接触电阻，当接触电阻与Rx相比不能忽略时，测量结果就会有很大的误差。绛旓細鍥犱负褰撳緟娴嬬數闃婚樆鍊煎緢灏忔椂锛屾祴鍑虹殑鍊硷紝鍖呭惈鏈妗ヨ噦闂寸殑寮曠嚎鐢甸樆鍜屾帴瑙︾數闃锛屽綋鎺ヨЕ鐢甸樆涓嶳x鐩告瘮涓嶈兘蹇界暐鏃讹紝娴嬮噺缁撴灉灏变細鏈夊緢澶х殑璇樊銆
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