At a point in space, the electric field points toward north. In the region surrounding this point, the rate of change of potential will be zero along
north
north-south
south
east-west
A
south
B
north
C
north-south
D
east-west
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Solution
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Equipotential surfaces are perpendicular to the electric lines of forces. So if electric field is towards north then equipotential surfaces will be in east-west direction
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