如图,M,N,和P是以MN为直径的半圈弧上的三点,O点为半圆弧的圆心,∠MOP=60° ,电荷量相等,符号相反的两个点电荷分别置于M,N两点,这时O点电场强度的大小为E1;若将N点处的点电荷移至P点,则O点
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![如图,M,N,和P是以MN为直径的半圈弧上的三点,O点为半圆弧的圆心,∠MOP=60° ,电荷量相等,符号相反的两个点电荷分别置于M,N两点,这时O点电场强度的大小为E1;若将N点处的点电荷移至P点,则O点](/uploads/image/z/10707883-43-3.jpg?t=%E5%A6%82%E5%9B%BE%2CM%2CN%2C%E5%92%8CP%E6%98%AF%E4%BB%A5MN%E4%B8%BA%E7%9B%B4%E5%BE%84%E7%9A%84%E5%8D%8A%E5%9C%88%E5%BC%A7%E4%B8%8A%E7%9A%84%E4%B8%89%E7%82%B9%2CO%E7%82%B9%E4%B8%BA%E5%8D%8A%E5%9C%86%E5%BC%A7%E7%9A%84%E5%9C%86%E5%BF%83%2C%E2%88%A0MOP%EF%BC%9D60%C2%B0+%2C%E7%94%B5%E8%8D%B7%E9%87%8F%E7%9B%B8%E7%AD%89%2C%E7%AC%A6%E5%8F%B7%E7%9B%B8%E5%8F%8D%E7%9A%84%E4%B8%A4%E4%B8%AA%E7%82%B9%E7%94%B5%E8%8D%B7%E5%88%86%E5%88%AB%E7%BD%AE%E4%BA%8EM%2CN%E4%B8%A4%E7%82%B9%2C%E8%BF%99%E6%97%B6O%E7%82%B9%E7%94%B5%E5%9C%BA%E5%BC%BA%E5%BA%A6%E7%9A%84%E5%A4%A7%E5%B0%8F%E4%B8%BAE1%EF%BC%9B%E8%8B%A5%E5%B0%86N%E7%82%B9%E5%A4%84%E7%9A%84%E7%82%B9%E7%94%B5%E8%8D%B7%E7%A7%BB%E8%87%B3P%E7%82%B9%2C%E5%88%99O%E7%82%B9)
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