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Electromagnetic TheoryElectric Potential

The electric field is oriented how with respect to an equipotential surface?

  • ANormal to it
  • BAlways tangent to it
  • CAt 45 degrees always
  • DRandomly
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Correct Answer: A. Normal to it
Explanation: Since E=-grad V, the field is normal to equipotential surfaces.
Reference: Standard electromagnetic theory: electric potential
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