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) `= 1.6 xx 10^(-19)` C.
Total charge present on the body .A. is `Q = n xx e`
`Q = 6.25 xx 10^(18) xx -1.6 xx 10^(-19)`
`= -10 xx 10^(-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]=-6 C`
`:.` Charge on each body = -3 C.