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Question 20244
JEE Physics · Hard

Magnetism: Magnetisation — Boundary Condition MCQ

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Magnetisation — Boundary ConditionHardQuestion 20244

Question

At a boundary between two magnetic media, which component of B is continuous?
  1. A
    Tangential component
  2. B
    Normal (perpendicular) component
    Correct
  3. C
    Both components
  4. D
    Neither component

Correct answer

Normal (perpendicular) component

Explanation

From ∇·B = 0 (Gauss's law for magnetism), the normal component of B is continuous at an interface: B₁ₙ = B₂ₙ. The tangential component of H (not B) is continuous at a boundary with no surface current.

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