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In one case, an inflated balloon is rubbed with a woollen cloth and in another, a ballpen refill is rubbed with polythene. When they are brought closer, it is observed that they attract each other. What can we understand by this? |
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Answer» In one case, an inflated balloon is rubbed with a woollen cloth and in another, a ballpen refill is rubbed with polythene. When they are brought closer, it is observed that they attract each other. What can we understand by this? |
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