c251_14 - Boundary Conditions For Magnetostatic Fields...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 1 • Within a homogeneous medium, there are no abrupt changes in H or B . However, at the interface between two different media (having two different values of μ), it is obvious that one or both of these must change abruptly. Watch the direction of a n . Boundary Conditions For Magnetostatic Fields • The normal component of the B vector field is continuous across a material interface (No magnetic charges) B 1n = B 2n μ 1 μ 2 a n B = μ H μ 1 H 1n = μ 2 H 2n μ 2 Boundary Conditions For Magnetostatic Fields (Cont.) • The tangential component of H is continuous across a material interface, unless a surface current exists at the interface: H 1t = H 2t , K = 0 μ 1 μ 2 a n B = μ H B 1t / μ 1 = B 2t / μ 2 , K = 0 3 ) ( a ˆ 2 1 K H H x n r r = Boundary Conditions For Magnetostatic Fields (Cont.) • When a surface current exists at the interface, the BC becomes In a perfect conductor, both the electric and magnetic fields must vanish in its interior. Thus, a surface current must exist
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/11/2011 for the course ELEC 251 taught by Professor Lynch during the Spring '10 term at Concordia Canada.

Page1 / 3

c251_14 - Boundary Conditions For Magnetostatic Fields...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online