Question

calculate the charge carried by 12.5 into 10 to the power 18 electron

Answer 1

charge on 1 electron =-1.602*10^(-19) coloumb

hence charge on given no. of electrons=

-1.602*10^(-19)*12.5*10^(18)
=-1.602*12.5/10
= - 2.0025 coloumb

hope it will help u

Answer 2

Given:

• Number of electrons in the body = 12.5 × 10¹⁸

To find:

The net charge by the body ?

Calculation:

The charge of a single electron is -1.6 × 10^(-19) C.

Now, the net charge on the body will be equal to integral multiples of the charge of a single electron.

$\therefore \: q = n \times e$

• q is net charge, n is number of electrons and e is electronic charge.

$\implies \: q = 12.5 \times {10}^{18} \times ( - 1.6 \times {10}^{ - 19} )$

$\implies \: q = - 12.5 \times 1.6 \times {10}^{18 - 19}$

$\implies \: q = - 20 \times {10}^{ - 1}$

$\implies \: q = - 2 \: C$

So, charge on the body is -2 Coulomb.