Electric field lines created by positive charge woule have its own electric field, if you are bringing any opposite polarity charge into that area, it will experience a force....of attraction.. For furtther study Go to Gauss law followed by COULUMB’s law...
shubham sharda
11 Years ago
It is due to some deep facts in special relativity and quantum mechanics that are known about. Unfortunately I don't know how to make the explanation simple. It would need a good understanding of these areas of Physics.