Electrical Engineering 117A - Fall 1998 - Schwarz - Midterm 2

Electrical Engineering 117A - Fall 1998 - Schwarz - Midterm 2

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EECS 117A, Midterm #2, Fall 1998 EECS 117A, Fall 1998 Midterm #2 Professor S.E. Schwarz Problem #1 (40 points) We want the four S-parameters for the block shown above. Use the notation shown. The reference impedance is 50 ohms. (a) Find S 11 (b) Find S 22 (c) Find S 21 (d) Find S 12 Problem #2 (30 points) Consider a thin, rigid, spherical shell of material centered at the origin. The shell occupies the space between r = a and r = a+h, and you should assume h << a. The shell has a uniform charge density rho , and it rotates around the polar axis (or z-axis) with angular velocity omega radians/sec. Find the magnitude | H | of the magnetic field at the origin. (If you happen to get an integral that you can't evaluate, just leave it in the form of an integral.) file:///C|/Documents%20and%20Settings/Jason%20Raft. ..%20-%20Fall%201998%20-%20Schwarz%20-%20Mid%202.htm (1 of 2)1/27/2007 4:28:56 PM
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EECS 117A, Midterm #2, Fall 1998
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Unformatted text preview: Problem #3 (30 points) The boundary between two electrically conductive materials lies in the x = 0 plane. Material 1 has epsilon 1 , sigma E1 , mu 1 and material 2 has epsilon 2 , sigma E2 , mu 2 . Let epsilon 2 = 2 epsilon 1 , sigma E2 = 3 sigma E1 , mu 2 = 5 mu 1 . There is an electrostatic field E 1 in Region 1, which makes an angle of 45 o with the normal to the interface, as shown. Find theta 2 , the angle between the electrostatic field and the normal on the right side of the boundary. Answer: theta = ____________ degrees Posted by HKN (Electrical Engineering and Computer Science Honor Society) University of California at Berkeley If you have any questions about these online exams please contact mailto:examfile@hkn.eecs.berkeley.edu file:///C|/Documents%20and%20Settings/Jason%20Raft. ..%20-%20Fall%201998%20-%20Schwarz%20-%20Mid%202.htm (2 of 2)1/27/2007 4:28:56 PM...
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Electrical Engineering 117A - Fall 1998 - Schwarz - Midterm 2

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