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Q. What is not true for equipotential surface for uniform electric Held?

Delhi UMET/DPMTDelhi UMET/DPMT 2006

Solution:

An equipotential surface is a surface with a constant value of potential at all points on the surface.
For a uniform electric field, say along the $x$-axis, the equipotential surfaces are planes normal to the $x$-axis,
i.e., plane parallel to they-$z$ plane.
Equipotential surfaces for a dipole and its electric field lines are shown in figure.
As said above that on equipotential surface, potential at all points is constant, this means that an equipotential surface work done in moving a test charge from the point to other point is zero.

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