How can you represent experimentally that $(i)$ there are two types of charges and $(ii)$ there is repulsion between two like charges and attraction between two unlike charges ?
Discuss the phenomena experienced due to electrostatics.
When a conducting soap bubble is negatively charged then
When a glass rod is rubbed with a silk cloth, charges appear on both. A similar phenomenon is observed with many other pairs of bodies. Explain how this observation is consistent with the law of conservation of charge.
Can we neglect the quantization of charge ? If yes, then mention the situation ?