Question

A silk cloth rubbed with a glass rod acquires a charge $-1.6\times {10}^{-11}C$. Then the charge on the glass rod is

Answer 1

Explanation,

1. An equal and opposite charge is transferred from one body to another when one body is rubbed with another.
2. So electrons get transferred from the glass rod to the silk cloth when they are rubbed against each other.
3. We know from conservation of charge that charge can neither be created nor be destroyed. So, only a transfer of charge could occur such that both the bodies will acquire an equal and opposite charge.
4. Therefore when the silk cloth must have a charge of $-1.6\times {10}^{-11}$$C$, the glass rod must have a charge of $1.6\times {10}^{-11}$ $C$.

Hence, a silk cloth rubbed with a glass rod acquires a charge $-1.6\times {10}^{-11}C$, then the charge on the glass rod is $1.6\times {10}^{-11}$ $C$.