Question

On rubbing a glass rod with silk cloth, $6.84\times {10}^{16}$ electrons are transferred from glass rod to silk cloth. Find the total charge transferred.

• A. $-1.09\times {10}^{-4}C$
• B. $-1.09\times {10}^{-3}C$
• C. $-1.09\times {10}^{-5}C$
• D. $-1.09\times {10}^{-2}C$

Answer 1

The correct option is D $-1.09\times {10}^{-2}C$

charge=$n\times e$

transferred=no. of electrons$\times$ transferred$\times$ charge on one electron.

$6.84\times {10}^{16}\times 1.6\times {10}^{-19}$

$10.944\times {10}^{-3}C$

$1.09\times {10}^{-2}C$

since electrons are transferred,

so, charge is $-ve$

so, the correct ans is (d) option.