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# HW_4 - voltage of R2 and(2 the power dissipated by R2...

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BME 311 Network Theory Homework #4 Due: February 25, 2009 Page 1 of 2 (c) John X.J. Zhang, UT Austin 1. Reading Assignment (to be tested in Quiz) Fundamentals of Electric Circuits (3 rd Ed), Alexander and Sadiku Chapter 3 2. Basic Problems (50 points) Solve the following problems from the textbook Chapter 3: 3.12 3.46 3.56 3.60 3.63 3. Biological Circuits (10 points) Consider a two-chambered beaker, the two chambers are separated by a membrane (dimensions: 2cm x 2cm x 2 mm). On either side of the membrane there is salt solution. The concentration of salt solution in one chamber is 5M and 10M in the other. Assuming the resistivity of the membrane is equal to 6.7 x10 -2 .m, find the current across the membrane due to the flow of ions if the system is at 25 ˚ C. 4. MATLAB – Potentiometer (10 points, multiple plots 1 point bonus). In the following circuit, R L is a potentiometer which varies from 0 to 30 Ohms. Plot (1) The

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Unformatted text preview: voltage of R2 and (2) the power dissipated by R2. Attach both the matlab code and the plots with necessary annotations. BME 311 Network Theory Homework #4 Due: February 25, 2009 Page 2 of 2 (c) John X.J. Zhang, UT Austin 5. PSpice (10 points) The circuit has two independent current sources. (1) How many branches and nodes are there in the circuit (consider super node to be one node)? Label all the nodes with numbers in your circuit. (2 points) (2) Use simulation to find all nodal voltages, the voltages across each resistor and its current (show voltage/current display in circuit as simulation result or attach output file). (5 points) (3) Get the total power consumption of the circuit of the circuit. Verify Kirchhoffs voltage law for all independent loops in the circuit. Verify Kirchhoffs current law for all the nodes. (3 points)...
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