Question

ye kagach hands par chipakta kyon h

Answer 1

Because it creates a static electricity between our hand and the polythene attached to copy. The electrons of copy and protons of our hand attract each other and this lead the copy to stick with our hand.

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Answer 2

Firstly it is plastic
And it is stick To book covers
So when you remove it the sticking power of That plastic also apply when you forcely try to stick on your hand in presence of some moisture but you have moisture on your hand it will stick most