How can object be charged with contact ?
When we touch a pith ball with an electrified plastic rod, some of the negative charges on the rod are transferred to the pith ball and it also gets charged. Thus the pith ball is charged by contact. It is then repelled by the plastic rod but is attracted by a glass rod which is oppositely charged.
What is earthing or grounding in household electrical circuit ?
Number of electrons in one coulomb of charge will be
A glass rod rubbed with silk is used to charge a gold leaf electroscope and the leaves are observed to diverge. The electroscope thus charged is exposed to $X$-rays for a short period. Then
What is called quantization of electric charge ? Write $SI$ unit of electric charge.
What is point charge ?