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## Homework Statement

A uniform electric field of magnitude 325 V/m is directed in the negative y direction in Figure P25.9. The coordinates of point A are (-0.200, -0.300) m, and those of point B are (0.400, 0.500) m. Calculate the potential difference VB - VA, using the blue path.

## The Attempt at a Solution

[tex]\Delta V = E \cdot \Delta d [/tex]

[tex]\Delta d = \sqrt{(0.4 - (-0.2))^2 + (0.5 - (-0.2))^2} = 1[/tex]

[tex]\Delta V = V_b - V_a = (-325V/m)(1m) = -325V[/tex]

Apparently the actual answer is just the vertical path, that is (-325V/m) * (-0.8m) = 260V

Now my question is, just what am I doing? I did the path from a to b and found the length to be 1.