半径为r的带有一缺口的细圆环,缺口长为d(d<<r,环上均匀带正电,总电量为q ,如图所示,则圆心o处的场强大小e为()。 简答题试题答案 Template




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tomski半径为r的带有一缺口的细圆环,缺口长为d(d<<r,环上均匀带正电,总电量为q ,如图所示,则圆心o处的场强大小e为()。 简答题试题答案 coloring