Suppose we have a positive +q charge and a -6q charge at some separation. Then will every field line originate from the +q and end up to -6q or will there be some extra lines coming to -6q from infinity because of higher charge to get 6 times the number of field lines? That is, will there be any line that does not originate from the positive charge but terminates at the negative one?
I think it should be that every line will originate from the positive and go to the negative, only difference will be in the density of the field lines. Am I right?
Also, if I talk about the flux now, why can I say that the flux near +q will be equal to that near -6q?