It is said that unlike charges attract. You should have observed that after the sticky
side of a piece of scotch tape is pulled quickly off the smooth side of another piece of
tape the tapes attract each other. Perhaps each tape has the same type of charge and
the rule has been stated backwards. Why do you believe that the charges on the two
tapes are different? Note: It is not acceptable to answer “because unlike charges
attract and I observed the attraction.”

Question

It is said that unlike charges attract. You should have observed that after the sticky 
side of a piece of scotch tape is pulled quickly off the smooth side of another piece of 
tape the tapes attract each other. Perhaps each tape has the same type of charge and 
the rule has been stated backwards. Why do you believe that the charges on the two 
tapes are different? Note: It is not acceptable to answer “because unlike charges 
attract and I observed the attraction.”

anonymous · Answer

Did you come up with some explanation??

anonymous · Answer

I know one is positively charged and the other one is negatively charged.so they attract :S

anonymous · Answer

why should one be positively charged and the other negatively charged? 
why is it not possible that both be positive maybe or both be negative?