Static electricity's all about charges which are not free to move. This causes them to build up in one place and leads to sparks or shocks when they finally do move - i.e crackling when you take a jumper off.
Build-up of Static is caused by Rubbing:
1) When two objects are rubbed together, electrons are scraped off one and dumped on the other.
2) This leaves a postive(+) static charge on one because electrons (-) have been lost.
3) It leaves a negative (-) static charge…