Question

A body is having a charge of 10 C. When it comes in contact with an uncharged body then it looses 1.6 C of charge. Find the number of electrons lost.

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

Answer 1

The correct option is C

${10}^{19}$

Given, charge lost = 1.6 C

1 electron has a charge of $1.6\times {10}^{-19}C$

We know, $Q=n\times e$

Hence, number of electrons lost, n = $\frac{Totalchargelost}{Chargeofanelectron}$​

$n=\frac{Q}{e}=\frac{1.6}{(1.6\times {10}^{-19})}={10}^{19}$

So, number of electrons lost = ${10}^{19}$