the substance that the electrons move ONTO becomes NEGATIVELY CHARGED because they GAIN ELECTRONS
the substance that the electrons move AWAY FROM becomes POSITIVELY CHARGED because they LOSE ELECTRONS.
eg a polythene rod ransfers electrons from the cloth to the rod- so the rod becomes negatievly charged from GAINING electrons
a perspex rod transfers electrons from the rod to the cloth- so the cloth becomes positievly charged from LOSING electrons.
friction causes electrons to be transferred from one material to another.
LIKE CHARGES REPEL, OPPOSITE CHARGES…