The Total solution for NCERT class 6-12
When a glass rod is rubbed with asilk cloth, charges appear on both. A similar phenomenon is observed with manyother pairs of bodies. Explain how this observation is consistent with the lawof conservation of charge.
Rubbing produces charges of equalmagnitude but of opposite nature on the two bodies because charges are createdin pairs. This phenomenon of charging is called charging by friction. The netcharge on the system of two rubbed bodies is zero. This is because equal amountof opposite charges annihilate each other. When a glass rod is rubbed with asilk cloth, opposite natured charges appear on both the bodies. This phenomenonis in consistence with the law of conservation of energy. A similar phenomenonis observed with many other pairs of bodies.