The pictures show four electrically charged items.
Balloon 1
Plastic sheet 1
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X
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Balloon 2
Plastic sheet 2
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-
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If a student rubs a glass rod with a piece of silk, giving the rod a positive charge, which of the items will the rod attract?
Type Answer HERE:
Balloon 1, only
Plastic Sheet 1, only
Balloon 1 and Plastic Sheet 2
Balloon 2 and Plastic Sheet 1
Balloon 1 and Plastic Sheet 1, only
Are you sure?
I apologize for the error in my previous response. The correct answer is Balloon 1, only.
When two objects are charged with the same type of charge (in this case, positive), they repel each other. Therefore, the glass rod (with a positive charge) will repel Balloon 2 (which is also positively charged) and Plastic Sheet 2 (which carries a negative charge). However, Balloon 1 (which is not charged) and Plastic Sheet 1 (which carries a positive charge) will be attracted to the positively charged glass rod. Thus, the correct answer is Balloon 1, only.