The electric potential in a region is represented as
`V=2x+3y-z`
obtain expression for electric field strength.

Explanation

`vec E = - [(del V)/(del x) hat i +(del V)/(del y)hat j +(del V)/(del z) hat k]`
Here, `(del V)/(del x) = (del)/(del x)(2 x + 3 y- z)= 2`
`(del V)/(del y) = (del)/(del y)(2 x + 3 y- z) = 3`
`(del V)/(del z)= (del)/(del z)(2 x + 3y - z) = -1`
`:. vec E = -2 hat i - 3 hat j + hat k`.