Answers

2014-09-10T09:20:47+05:30
When two objects rubbed each other charges are produced due to friction for eg. take a plastic comb rub it in your dried hair and keep it near small pieces of paper,we can see that bits of paper get attracted to the plastic comb
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but i had one doubt:in this process the mass of bodies changes or not??
2014-09-10T13:20:18+05:30
What you are asking is called static electricity.
the examples are
1)coming the hair...
the comb gains static electricity
2)the woolen muffler rubbed with plastic
3)the thunder bolt in a storm



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but i had one doubt:in this process the mass of bodies changes or not??
yeah it may change slighty dure to the friction it may