When insulating materials rub against each other, they may become electrically charged
Electrons may be ‘rubbed off’ one material and on to the other.
The material that gains electrons becomes negatively charged
The material that loses electrons is left with a positive charge.
When a polythene rod is rubbed with a duster, the friction
causes electrons to gain energy. Electrons gain enough energy to leave the atom and ‘rub off’ onto the polythene rod.
Does this have a positive or negative charge?
Positive
The closer together the arrows are, the stronger the field and the greater the force experienced by charges in that field. This means that the field is stronger closer to the object.
