Question

On rubbing a glass rod with silk, the glass acquires positive charge. This is because:

• A. electrons are transferred from silk to glass
• B. electrons are transferred from glass to silk
• C. protons are transferred from silk to glass
• D. protons are transferred from glass to silk

Answer 1

Answer:

B. electrons are transferred from glass to silk

• When a glass rod is rubbed with silk, the glass acquires a positive charge because (B) electrons are transferred from the glass to the silk.
  

• Positive and Negative Charge: Objects become positively charged when they lose electrons and negatively charged when they gain electrons.

• Electron Transfer: In the case of glass and silk, the electrons in the glass rod are held less tightly than those in the silk. When the two materials are rubbed against each other, the friction provides the energy needed to transfer the loosely bound electrons from the glass rod to the silk cloth.

• Result: The glass rod, having lost negatively charged electrons, is left with a net positive charge. Conversely, the silk cloth, having gained electrons, acquires a net negative charge.

Protons are located in the nucleus of an atom and are not transferred during this type of charging by friction.