Electric field:

$\overline{){\mathbf{E}}{\mathbf{=}}{\mathbf{-}}\frac{\mathbf{\u2206}\mathbf{V}}{\mathbf{\u2206}\mathbf{x}}}$

The electric field points in the direction of the decreasing potential. A is at a higher potential.

What is the potential difference between A and B?

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