Okay, this is what I have learned about electrolysis and plucking. I got this from my electrolysis tech whom I trust implicitly. Plucking will eventually damage the hair follicle enough that it will die; unfortunately, the time it takes to do this is extremely lengthy. I'm talking years and years of plucking. I plucked facial hairs everyday for almost a year before I finally booked my first electrolysis appointment. I told my electrolysis tech this and she agreed plucking does damage the hair follicle, but not in a good way. Plucking changes the angles of how the hair grows back and can also dry out the root; both of which make electrolysis less effective and more difficult. You want the root to be as moist as possible. As I understand it, electrolysis does not electrocute the hair follicle, but instead, the needle probe they use sends out a radio signal (microwaves) which "excites" the water molecules in the hair follicle. The hair follicle then heats up and it dies because of the heat that is produced. It's exactly how a microwave oven works, but on a much smaller scale obviously. She is also not to keen on laser for facial hair. She said laser works pretty well on the legs and arms, provided you have light skin and dark hairs, but it is not nearly as effective on the face.
So in short, plucking will work. It may take 20-30 to work, but it will probably eventually kill the hair follicle. Electrolysis has around a 30% effective kill rate. So for every 10 hairs treated, 3 will die. That's why it takes 4-5 complete clearings of electrolysis before things are said and done. It hurts, but it is effective. Hope this helps.