31．用电流表和电压表测�属丝的电阻时按如图所示的电路进行测量利用该电路进行实验的主要操作过程是第一步先将r2的�动头调到最左端 Sketch Coloring Page

31．用电流表和电压表测�属丝的电阻时按如图所示的电路进行测量利用该电路进行实验的主要操作过程是第一步先将r2的�动头调到最左端 Template

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tomski31．用电流表和电压表测�属丝的电阻时按如图所示的电路进行测量利用该电路进行实验的主要操作过程是第一步先将r2的�动头调到最左端 coloring

小华同学做“用电流表电压表测电阻实验”，实验器材齐全且完好．�他连接电路并将变阻器的�片放置于一端，闭合电键，观察到电流表电压表示数如图（a sketch template

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31．用替代法测电流表内电阻的电路图如图所示．器材待测电流表A量程010mA内阻RA约为30Ω电流表A/量程50mA电阻箱R10 sketch template

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31．用替代法测电流表内电阻的电路图如图所示．器材待测电流表A量程010mA内阻RA约为30Ω电流表A/量程50mA电阻箱R10 sketch template

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