如图所示,用一根绝缘轻绳悬挂一个带电小球,小球的质量为m=1.0*10-2kg,细线长为1m,现加一水平方向向左的匀强电场,场强E=3.0*10 6 N/C,平衡时绝缘线与竖直方向的夹角为30°,求: (1)小球带何种电荷,
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![如图所示,用一根绝缘轻绳悬挂一个带电小球,小球的质量为m=1.0*10-2kg,细线长为1m,现加一水平方向向左的匀强电场,场强E=3.0*10 6 N/C,平衡时绝缘线与竖直方向的夹角为30°,求: (1)小球带何种电荷,](/uploads/image/z/11663337-57-7.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E7%94%A8%E4%B8%80%E6%A0%B9%E7%BB%9D%E7%BC%98%E8%BD%BB%E7%BB%B3%E6%82%AC%E6%8C%82%E4%B8%80%E4%B8%AA%E5%B8%A6%E7%94%B5%E5%B0%8F%E7%90%83%2C%E5%B0%8F%E7%90%83%E7%9A%84%E8%B4%A8%E9%87%8F%E4%B8%BAm%3D1.0%2A10-2kg%2C%E7%BB%86%E7%BA%BF%E9%95%BF%E4%B8%BA1m%2C%E7%8E%B0%E5%8A%A0%E4%B8%80%E6%B0%B4%E5%B9%B3%E6%96%B9%E5%90%91%E5%90%91%E5%B7%A6%E7%9A%84%E5%8C%80%E5%BC%BA%E7%94%B5%E5%9C%BA%2C%E5%9C%BA%E5%BC%BAE%3D3.0%2A10+6+N%2FC%2C%E5%B9%B3%E8%A1%A1%E6%97%B6%E7%BB%9D%E7%BC%98%E7%BA%BF%E4%B8%8E%E7%AB%96%E7%9B%B4%E6%96%B9%E5%90%91%E7%9A%84%E5%A4%B9%E8%A7%92%E4%B8%BA30%C2%B0%2C%E6%B1%82%3A+%281%29%E5%B0%8F%E7%90%83%E5%B8%A6%E4%BD%95%E7%A7%8D%E7%94%B5%E8%8D%B7%2C)
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