(2012•洛阳模拟)如图所示,摆长为L的不可伸长绝缘细线,一端固定在O点,另一端系一质量为m,带电荷量为+q小球,整个装置处于方向水平向右的匀强电场中,场强大小为E=mg/q,小球的平衡位置
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![(2012•洛阳模拟)如图所示,摆长为L的不可伸长绝缘细线,一端固定在O点,另一端系一质量为m,带电荷量为+q小球,整个装置处于方向水平向右的匀强电场中,场强大小为E=mg/q,小球的平衡位置](/uploads/image/z/4515329-65-9.jpg?t=%EF%BC%882012%26%238226%3B%E6%B4%9B%E9%98%B3%E6%A8%A1%E6%8B%9F%EF%BC%89%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E6%91%86%E9%95%BF%E4%B8%BAL%E7%9A%84%E4%B8%8D%E5%8F%AF%E4%BC%B8%E9%95%BF%E7%BB%9D%E7%BC%98%E7%BB%86%E7%BA%BF%2C%E4%B8%80%E7%AB%AF%E5%9B%BA%E5%AE%9A%E5%9C%A8O%E7%82%B9%2C%E5%8F%A6%E4%B8%80%E7%AB%AF%E7%B3%BB%E4%B8%80%E8%B4%A8%E9%87%8F%E4%B8%BAm%2C%E5%B8%A6%E7%94%B5%E8%8D%B7%E9%87%8F%E4%B8%BA%2Bq%E5%B0%8F%E7%90%83%2C%E6%95%B4%E4%B8%AA%E8%A3%85%E7%BD%AE%E5%A4%84%E4%BA%8E%E6%96%B9%E5%90%91%E6%B0%B4%E5%B9%B3%E5%90%91%E5%8F%B3%E7%9A%84%E5%8C%80%E5%BC%BA%E7%94%B5%E5%9C%BA%E4%B8%AD%2C%E5%9C%BA%E5%BC%BA%E5%A4%A7%E5%B0%8F%E4%B8%BAE%3Dmg%2Fq%2C%E5%B0%8F%E7%90%83%E7%9A%84%E5%B9%B3%E8%A1%A1%E4%BD%8D%E7%BD%AE)
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