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Asked by Tarun Last Modified
Answer 
Sadika
When a glass rod is rubbed with a silk cloth, the glass rod acquires a positive charge, and the silk cloth acquires a negative charge. This charging occurs due to the triboelectric effect, where electrons are transferred between the two materials during rubbing.
Here's a breakdown of what happens:
Contact and Rubbing: When the glass rod and silk cloth are rubbed together, the surfaces of the two materials come into contact. During this contact, some electrons from the atoms of the silk cloth are transferred to the atoms of the glass rod.
Electron Transfer: The glass rod has a higher affinity for electrons compared to the silk cloth. As a result, electrons from the silk cloth are transferred to the glass rod. This leaves the silk cloth with a net positive charge, as it has lost electrons, and the glass rod with a net negative charge, as it has gained electrons.
Separation: After rubbing, the glass rod and silk cloth are separated. The charges acquired during rubbing remain localized on the surfaces of the materials.
Final Charge: The glass rod is left with a positive charge, and the silk cloth is left with a negative charge. This means that the glass rod and silk cloth attract each other due to their opposite charges.
In summary, when a glass rod is rubbed with a silk cloth, the glass rod becomes positively charged, and the silk cloth becomes negatively charged. This phenomenon is a result of the transfer of electrons between the two materials during rubbing.
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