一道中学物理题（英文表述）A charged sphere is placed inside a metal container by an insulated thread.The container is earthed .Which of the diagranms shows the distribution of charges correctly?

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一道中学物理题（英文表述）A charged sphere is placed inside a metal container by an insulated thread.The container is earthed .Which of the diagranms shows the distribution of charges correctly?
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一道中学物理题（英文表述）A charged sphere is placed inside a metal container by an insulated thread.The container is earthed .Which of the diagranms shows the distribution of charges correctly?
一道中学物理题（英文表述）
A charged sphere is placed inside a metal container by an insulated thread.The container is earthed .Which of the diagranms shows the distribution of charges correctly?

一道中学物理题（英文表述）A charged sphere is placed inside a metal container by an insulated thread.The container is earthed .Which of the diagranms shows the distribution of charges correctly?
A 金属内部有正负电荷,当放入小球后,和小球电荷相反的被小球吸引而靠近小球,而相异的电荷会在金属中而被大地吸收.

题我看懂了，你的图能画的好点吗，用工具，画标准点我看看

The answer is A.
Because the container is earthed, its outer surface should be neutral. So B and D are incorrect.
Also the inner surface of the container and the sphere should have opposite electric charge, so C is incorrect.
Therefore, the correct answer is A.

选 A

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