Consider a positively charged wire bent into the shape of a capital "U". Point P is down in the well of the "U" (specifically at the center of curvature). At point P, the direction of the E-field is

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Quizplus · Accepted Answer

The electric field lines radiate outward from a positively charged object. At point P, which is at the center of curvature of the "U" shaped wire, the electric field lines from each side of the "U" shape would be directed away from the wire. Since point P is below the wire, the net electric field at point P would be directed upward, or toward the top of the page, due to the symmetric distribution of the charge along the "U" shape.

Consider a Positively Charged Wire Bent into the Shape of a Capital