电流表内外接的原则?
人气:117 ℃ 时间:2020-03-28 10:48:49
解答
待测电阻的阻值远大于电流表内阻时,电流表内接法.电压表阻值远大于待测电阻阻值是,电流表外接法.
所谓的“远大于”一般指大于10倍或以上.
但是,如果这两个条件都不满足或者都满足,那么就看是待测电阻/电流表内阻的比值大还是电压表内阻/待测电阻的比值大.按照大的那个进行电流表连接.
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