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Electromagnetic TheoryPotential Equations

In a charge-free region with uniform permittivity, the electrostatic potential V satisfies?

  • ALaplace's equation
  • BPoisson's equation with nonzero charge density
  • CWave equation only
  • DContinuity equation only
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Correct Answer: A. Laplace's equation
Explanation: When volume charge density is zero, Poisson's equation reduces to Laplace's equation, ∇²V=0.
Reference: Standard electromagnetic theory: potential equations
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