第八章 恒定电流第49课时 电学实验基本能力集释(实验增分课)
第49课时 电学实验基本能力集释(实验增分课)(一)游标卡尺和螺旋测微器课时跟踪检测(二)电流表的内接法与外接法(三)分压电路和限流电路(四)电表的改装返回(一)游标卡尺和螺旋测微器(一)游标卡尺返回1.原理:利用主尺的最小分度与游标尺的最小分度的差值制成。不管游标尺上有多少个小等分刻度,它的刻度部分的总长度比主尺上的同样多的小等分刻度少1mm。2.精度:对应关系为10分度0.1mm,20分度0.05mm,50分度0.02mm。3.读数:若用x表示由主尺上读出的整毫米数,K表示从游标尺上读出与主尺上某一刻线对齐的游标刻线的格数,则记录结果表达为(x+K×精度)mm。返回1.原理:测微螺杆与固定...
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