光滑绝缘水平地面上,相隔2L处的A.B两点固定有两个电荷量均为如图,光滑绝缘的水平地面上,相隔2L处的A、B两点固定有两个电量均为Q的正点电荷,a、o、b是AB连线上的三点,且o为中点,oa=ob=L/2,一
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![光滑绝缘水平地面上,相隔2L处的A.B两点固定有两个电荷量均为如图,光滑绝缘的水平地面上,相隔2L处的A、B两点固定有两个电量均为Q的正点电荷,a、o、b是AB连线上的三点,且o为中点,oa=ob=L/2,一](/uploads/image/z/11282356-28-6.jpg?t=%E5%85%89%E6%BB%91%E7%BB%9D%E7%BC%98%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E4%B8%8A%2C%E7%9B%B8%E9%9A%942L%E5%A4%84%E7%9A%84A.B%E4%B8%A4%E7%82%B9%E5%9B%BA%E5%AE%9A%E6%9C%89%E4%B8%A4%E4%B8%AA%E7%94%B5%E8%8D%B7%E9%87%8F%E5%9D%87%E4%B8%BA%E5%A6%82%E5%9B%BE%2C%E5%85%89%E6%BB%91%E7%BB%9D%E7%BC%98%E7%9A%84%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E4%B8%8A%2C%E7%9B%B8%E9%9A%942L%E5%A4%84%E7%9A%84A%E3%80%81B%E4%B8%A4%E7%82%B9%E5%9B%BA%E5%AE%9A%E6%9C%89%E4%B8%A4%E4%B8%AA%E7%94%B5%E9%87%8F%E5%9D%87%E4%B8%BAQ%E7%9A%84%E6%AD%A3%E7%82%B9%E7%94%B5%E8%8D%B7%2Ca%E3%80%81o%E3%80%81b%E6%98%AFAB%E8%BF%9E%E7%BA%BF%E4%B8%8A%E7%9A%84%E4%B8%89%E7%82%B9%2C%E4%B8%94o%E4%B8%BA%E4%B8%AD%E7%82%B9%2Coa%3Dob%3DL%2F2%2C%E4%B8%80)
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