Final Exam 080606 - Department of Electrical and Computer...

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Unformatted text preview: Department of Electrical and Computer Engineering Module 0404215 Electromagnetic (I) Final Exam 08/06/2006 Time allowed: 2 hour → ∧ ∧ ∧ → Q1) Given that F = x 2 x − xz y − y 2 z , calculate the circulation of F around the (closed) path shown in Figure 1? (10 points) Figure 1 Q2) (a) What are the three types of magnetic materials and what are typical values of their relative magnetic permeabilities? (b) What are the major differences between the behavior of the electric forces and the behavior of the magnetic forces? (10 points) Q3) For a coaxial cable of inner radius a, outer radius b and length l derive an expression for the magnetic energy stored in the coax if the insulation material between the inner and the outer (10 points) has permeability μ ? → ∧ ∧ ∧ Q4) The plane boundary defined by z = 0 separates air from a block of iron. If B1 = 4 x − 6 y + 8 z in air → (z ≥ 0), find B2 in iron (z ≤ 0), given that μ = 5000 μ 0 for iron? → ∧ → (10 points) ∧ Q5) Planes z = 0 and z = 4 carry current K = −10 x A/m and K = 10 x A/m , respectively. Determine → H at (a) (1,1,1) (b) (0, -3, 10) (10 points) ALL THE BEST DR OMAR AL-SARAEREH www.Husni.Net ...
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