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具体解释一下将电流表扩大量程的原理,及分流电阻的计算
人气:421 ℃ 时间:2020-05-06 06:56:54
解答
假定电流表量程扩大到原来K倍,原来电流表内阻Ro,扩流并联电阻Rx
则有关系:
V/R = V/Ro + V/Rx
V/R = K*V/Ro
解算得到 Rx = Ro/(K-1)
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