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(Figure 3.27) shows equipotential surfac...

(Figure 3.27) shows equipotential surfaces. What is the direction of electric field `vec E` at P and R?
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Electric field lines are perpendicular to the equipotential surfaces and point in the direction of decreasing potential. At P, electric field `vec E` is to the left and at R, `vec E` is upward.
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CENGAGE PHYSICS ENGLISH-ELECTRIC POTENTIAL-DPP 3.5
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