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MCQ Practice Question

Electromagnetic Theory Boundary Conditions

At the boundary between two perfect dielectric media with no free surface charge, which component of electric flux density D is continuous?

ANormal component
BTangential component only
CBoth components must be zero
DNeither component

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Correct Answer: A. Normal component

Explanation: The boundary condition is D1n-D2n=ρs. With no free surface charge, the normal components are equal.

Reference: Standard electromagnetic theory: boundary conditions

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