Question

A glass rod when rubbed with silk cloth acquires a charge $1.6\times {10}^{-13}C$. What is the charge on the silk cloth?

• A. $-1.6\times {10}^{-19}C$
• B. $1.6\times {10}^{-13}C$
• C. $-1.6\times {10}^{-13}C$
• D. $1.6\times {10}^{-19}C$

Answer 1

The correct option is C $-1.6\times {10}^{-13}C$

When a glass rod is rubbed with silk, both gets electrified due to charging by friction. Given, glass rod acquires positive charge $=1.6\times {10}^{-31}C$. So silk acquires equal and opposite charge as that on glass rod. Hence the answer is $-1.6\times {10}^{-13}C$.