Chapter 26, Problem 46EAP

The electric potential in a region of space is $V=(\text{15}0x^{\text{2}}—\text{2}00y^{\text{2}})\text{ V}$ ,

where x and y are in meters. What are the strength and

direction of the electric field at (x, y) = (2.0 m, 2.0 m)? Give the

direction as an angle cw or ccw (specify which) from the positive

x-axis.