The eleastic field in a region is given by `oversettoE=(Ax+B)hati` Where E is in `NC^(-)` and x is in metres. The values of constants are `A=20SI` Unit and `B==10SI` unit. If the potential at `x=1` is `V_(1)` and that at `x=-5` is `V_(2)` then `V_(1)-V_(2)` is:
