Write Coulomb's law in vector form and explain the terms.

Explanation

`vecF_(2I)= (1)/(4piepsilon_(0))(q_(1)q_(2))/(r_(2I)^(2)) hatr_(2I)`
Where `vecF_(21) rightarrow` Force on `q_(2)` due to `q_(1)`
`vecr_(1)` and `vecr_(2)` are the position vectors of `q_(1)` and `q_(2)` and
`hatr_(21)rightarrow` unit vector in the direction of `vecr_(21)`