Predict/Explain A positive charge is moved from one location on an equipotential to another point on the same equipotential. (a) Is the work done on the charge positive, negative, or zero? (b) Choose the best explanation from among the following: I. The electric field is perpendicular to an equipotential, therefore the work done in moving along an equipotential is zero.
I. Because the charge is positive the work done on it is also positive.
II. It takes negative work to keep the positive charge from accelerating as it moves along the equipotential.
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