There are `5 xx 10^21` atoms in a object of 1 g. If one electron is removed from 0.01% atom, what will be the charge on the sphere ?

Options

A. `+0.08`
B. 0.8
C. `-0.008`
D. `-0.8`

Answer

A

Explanation

`N = 5 xx 10^(23)` atoms
No. of atoms which removes electrons
`n = 0.01 % of N`
`= N xx 10^(-4)`
`=5 xx 10^(21) xx 10^(-4)`
`=5 xx 10^(17)`
`therefore` Positive charge on object by removing .n. electrons,
`therefore Q = "ne"`
`=5 xx 10^(17) xx 1.6 xx 10^(-19)`
`=8 xx 10^(-2)`
`=+0.08 C`