如图所示,一根半径为r的无限长直铜导线,载有电流i,电流均匀分布在导线的横截面上。在导线内部通过中心轴作一横切面s,则通过横切面s上每单位长度 Template




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tomski如图所示,一根半径为r的无限长直铜导线,载有电流i,电流均匀分布在导线的横截面上。在导线内部通过中心轴作一横切面s,则通过横切面s上每单位长度 coloring