Inflate two balloons and rub both of them with a cloth first and then with different materials. Will they attract each other in both cases?

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Solution

No, they will not attract each other.
Both the balloons will repel each other. (1 mark)

The reason is that both balloons rubbed with the same material will acquire the same charge in both cases. And we know that like charges repel.
Hence, both the balloons will repel. (1 mark)

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Q. An inflated balloon is rubbed with a woollen cloth and in another case, a ballpen refill is rubbed with polythene.
When the balloon and refill are brought closer, it is observed that they attract each other. What can we understand by this?

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Inflate two balloons and rub both of them with a cloth first and then with different materials. Will they attract each other in both cases?

No, they will not attract each other. Both the balloons will repel each other. (1 mark) The reason is that both balloons rubbed with the same material will acquire the same charge in both cases. And we know that like charges repel. Hence, both the balloons will repel. (1 mark)

No, they will not attract each other.
Both the balloons will repel each other. (1 mark)

The reason is that both balloons rubbed with the same material will acquire the same charge in both cases. And we know that like charges repel.
Hence, both the balloons will repel. (1 mark)