In an electric field produced by a point charge Q (either positive or negative), a test charge is moved from a distance r to distance 2r. Explain how will you decide if ∆V between these two points is positive or negative?
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Expert's answer
2020-05-21T14:00:57-0400
∆V between these two points is positive when two charge have opposite sign.
∆V between these two points is negative when two charge have the same sign.
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