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Unformatted text preview: EE 311 Homework 09 (Due April 6, Wednesday, Class Time) Magnetic Boundary Conditions, Inductance and Magnetic Energy (5 questions)
1. (20 pts) 2. (20 pts) 3. (20 pts) A solid dielectric sphere of relative permeability 4 is placed in free space. The radius of the sphere is 2 m. The H field is known to be H = 2ar + 4aq A/m inside the sphere. No current flows on the surface of the dielectric sphere. The H field outside of the sphere is (you can show your derivation on the right side of the choices): A) H = 0.5a r A m A m B) H = 0.5ar + 2a A C) H = 0.5ar + 4aq + 4af m D) H = 4ar A m A m E) H = 8a r + 4a F) H = 2ar + 2a A m G) None of the above 4. (20 pts). A tightly wound coil of 1000 turns is 0.1 m long, has free space inside the coil, 1 A flowing through it. What is the energy density inside the coil? and has a current of o 5. (20 pts). ...
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- Fall '08