Question

Q.6 a . A dry cloth is used to rub a polythene rod, the rod becomes negatively charged.
Describe why the insulator becomes negatively charged.
[2]

Answer 1

Answer:

When insulating materials rub against each other, they may become electrically charged . Electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. ... Electrons gain enough energy to leave the atom and 'rub off' onto the polythene rod.

Hope it helps.....