固定不动的正电荷A带电量为Q=1.0*10^-6C,点电荷B从距A无穷远的电势能为零处移到A为3m、电势为3000V的P点电场力做功-1.8*10^-3J,求(1)电荷B的电荷量.(2)电荷B在P点处所受的电场力大小(3)若
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![固定不动的正电荷A带电量为Q=1.0*10^-6C,点电荷B从距A无穷远的电势能为零处移到A为3m、电势为3000V的P点电场力做功-1.8*10^-3J,求(1)电荷B的电荷量.(2)电荷B在P点处所受的电场力大小(3)若](/uploads/image/z/3490827-51-7.jpg?t=%E5%9B%BA%E5%AE%9A%E4%B8%8D%E5%8A%A8%E7%9A%84%E6%AD%A3%E7%94%B5%E8%8D%B7A%E5%B8%A6%E7%94%B5%E9%87%8F%E4%B8%BAQ%3D1.0%2A10%5E-6C%2C%E7%82%B9%E7%94%B5%E8%8D%B7B%E4%BB%8E%E8%B7%9DA%E6%97%A0%E7%A9%B7%E8%BF%9C%E7%9A%84%E7%94%B5%E5%8A%BF%E8%83%BD%E4%B8%BA%E9%9B%B6%E5%A4%84%E7%A7%BB%E5%88%B0A%E4%B8%BA3m%E3%80%81%E7%94%B5%E5%8A%BF%E4%B8%BA3000V%E7%9A%84P%E7%82%B9%E7%94%B5%E5%9C%BA%E5%8A%9B%E5%81%9A%E5%8A%9F-1.8%2A10%5E-3J%2C%E6%B1%82%EF%BC%881%EF%BC%89%E7%94%B5%E8%8D%B7B%E7%9A%84%E7%94%B5%E8%8D%B7%E9%87%8F.%EF%BC%882%EF%BC%89%E7%94%B5%E8%8D%B7B%E5%9C%A8P%E7%82%B9%E5%A4%84%E6%89%80%E5%8F%97%E7%9A%84%E7%94%B5%E5%9C%BA%E5%8A%9B%E5%A4%A7%E5%B0%8F%EF%BC%883%EF%BC%89%E8%8B%A5)
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