We know that static electricity can be produced by rubbing cloth in pipes, and so on. My question is how this static electricity is produced. I had read so many answers for this. The answer is transferring electrons from cloth to pipe. Thus pipe acquires negative charge and cloth becomes positive charge. If this answer is correct, i have another question due to the electrons transfer from cloth to pipes, there is no changes in the property of both materials so why the property is not changing due to this electron transfer?