The diagram shows a charged plastic rod and an uncharged metal sphere. The metal sphere is suspended by an insulating thread.
The plastic rod is then moved close to the metal sphere.
Which row is correct?
1 )
observation:The rod attracts the sphere. / the overall state of the metal sphere:charged
observation:The rod attracts the sphere. / the overall state of the metal sphere:uncharged
3 )
observation:The rod repels the sphere. / the overall state of the metal sphere:charged
4 )
observation:The rod repels the sphere. / the overall state of the metal sphere:uncharged
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