Number of excess electrons present on a conducting body A is `6.25xx10^(18)`. When it is brought in contact with another identical conducting body of charge - 5 coulomb, find the charge present on each body.

Explanation

Number of excess electrons present on the body 'A', `n=6.25 xx 10^(18)`.
Charge of each electron `(e)=1.6xx10^(-19)C`.
`:.` Total charge present on the body 'A' is `Q=n xx e`.
`Q=6.25xx10^(18)xx -1.6xx10^(-19)`
`=-10xx10^(-1)=-1` coulomb
The charge present on body 'B' = -5 coulomb.
When these two bodies are brought in contact, the charge distributes uniformly over its surface. (both are identical)
`:.` Total charge `= -[1 C + 5 C]= -6C`
`:.` Charge on each body `= - 3 C`.