The electric field on the x-axis due to a point charge fixed at the origin is given by E=(b/x^2)i where b = 2.0kV * m and x does not = 0.
(a) Find the magnitude and sign of the point charge.
(b) Find the potential difference between the point on the x-axis at x = 1.00m and x = 2.0m. Which of these points is at the higher potential?