Which equations should be used only in a uniform electric field? Choose two correct answers.

In a uniform electric field, the potential difference across a distance d along the field is ΔV = Ed, so choice E applies. The work associated with moving a charge through that potential difference is W = qΔV = qEd, which matches choice C. The relation F = qE in choice B can also apply in nonuniform fields when E is the local field, so it is not limited to uniform fields.

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