The position vectors of two equal 1 micro coloumb each are (i^+j^+k^)m and (2i^+3j^-k^)m.what is the magnitude of electrostatic force between them along X-direction?

Hi,

Coulombic force, F = k q2r^ / r2
r^ = (r2– r1)/ r =(i + 2j – 2k) / 3
Now, put this value of r^ in the force equation to get the force vector.
The ‘i’ component of the force vector would be the force in x-direction.

thanks.