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Unformatted text preview: EE321 Exam 1 Spring 2009 Notes : Write your name and ID on blue book. This part of exam will be recycled. You must show work for credit, except for problem 6. Achieving a score of 60% or above on this exam satisfies ABET Objective 1 and Objective 2. Good luck ! 1.) 10 pts. Consider a Cartesian coordinate system. Suppose there exists a uniform H-field with a +10 A/m component in the x-direction, a +20 A/m component in the y-direction, and a -5 A/m component in the z-direction. What is the magneto motive force drop between the starting point (5,2,1) (x, y, z) and the ending point (4,2,4). For problems 2-3, consider the split toroid shown below. The cross section of the toroid is rectangular. 2.) 15 pts. The permeability of the magnetic material in the split toroid may be expressed 5000 ( ) 1 | | B B B = + where is the permeability of free space, 7 10 4- H/m. Now suppose 1 g = mm, 10 r = cm, 1 w = cm, 2 d = cm, 1 100 N = , 2 20 N = , and 1 5 i = A. If the flux linking the second winding is...
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- Spring '08