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知乎 on MSN
5 天
有哪些题目看着简单,但实际上做起来非常「折磨人」?
这就不得不提起这几天做的一道电学题了。 声明:本题旨在对积分进行练习,计算过程中请不要查阅积分表。 题目:如图,有一个均匀带电平板,面电荷密度为 \sigma 。以平板所在平面为 xy 平面,平板中心为原点 O ,沿 x 轴的长度为 a ,沿 y ...
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