A glass rod is rubbed with silk cloth. What type of charge is acquired by (a) silk cloth, (b) glass rod?
(a) Silk cloth will acquire a negative charge. (b) Glass rod will acquire positive charge.
A glass rod is rubbed with a silk cloth and an inflated rubber balloon is rubbed with a woollen cloth.
Now, out of glass rod, silk cloth, rubber balloon and woollen cloth:
(a) Which two objects acquire negative charge?
(b) Which two objects acquire positive charge?