一个很小的小球带有电量Q,在距离球心30㎝处的A点放了一个试探电荷q = −1×10-10C,q 受到的电场力为1×10-8N,方向指向球心.求:(1)A点的场强的大小和方向(2)如果从A点取走q,A点场强大
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![一个很小的小球带有电量Q,在距离球心30㎝处的A点放了一个试探电荷q = −1×10-10C,q 受到的电场力为1×10-8N,方向指向球心.求:(1)A点的场强的大小和方向(2)如果从A点取走q,A点场强大](/uploads/image/z/8134362-18-2.jpg?t=%E4%B8%80%E4%B8%AA%E5%BE%88%E5%B0%8F%E7%9A%84%E5%B0%8F%E7%90%83%E5%B8%A6%E6%9C%89%E7%94%B5%E9%87%8FQ%2C%E5%9C%A8%E8%B7%9D%E7%A6%BB%E7%90%83%E5%BF%8330%E3%8E%9D%E5%A4%84%E7%9A%84A%E7%82%B9%E6%94%BE%E4%BA%86%E4%B8%80%E4%B8%AA%E8%AF%95%E6%8E%A2%E7%94%B5%E8%8D%B7q+%3D+%26%238722%3B1%C3%9710%EF%BC%8D10C%2Cq+%E5%8F%97%E5%88%B0%E7%9A%84%E7%94%B5%E5%9C%BA%E5%8A%9B%E4%B8%BA1%C3%9710%EF%BC%8D8N%2C%E6%96%B9%E5%90%91%E6%8C%87%E5%90%91%E7%90%83%E5%BF%83.%E6%B1%82%EF%BC%9A%EF%BC%881%EF%BC%89A%E7%82%B9%E7%9A%84%E5%9C%BA%E5%BC%BA%E7%9A%84%E5%A4%A7%E5%B0%8F%E5%92%8C%E6%96%B9%E5%90%91%EF%BC%882%EF%BC%89%E5%A6%82%E6%9E%9C%E4%BB%8EA%E7%82%B9%E5%8F%96%E8%B5%B0q%2CA%E7%82%B9%E5%9C%BA%E5%BC%BA%E5%A4%A7)
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