Q. How can you charge a metal sphere positively without touching it ?
Dear Student
An uncharged metallic sphere will become positively charged when a negatively charged rod is brought near the sphere. This will induce positive charge on the nearer end because the electrons will repel due to negatively charged rod and opposite end will become negatively charged due to the flow of electrons there. Than after it the negatively charged end is connected to earth due to which these negative charges will flow inside the earth and than we remove the rod.So at the end the metallic sphere will become positively charged. This is called as induction.
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Regards
An uncharged metallic sphere will become positively charged when a negatively charged rod is brought near the sphere. This will induce positive charge on the nearer end because the electrons will repel due to negatively charged rod and opposite end will become negatively charged due to the flow of electrons there. Than after it the negatively charged end is connected to earth due to which these negative charges will flow inside the earth and than we remove the rod.So at the end the metallic sphere will become positively charged. This is called as induction.
Hope this information will clear your doubts about topic.
If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.