# 2300HW02 - ECE 2300 CIRCUIT ANALYSIS HOMEWORK #2 Notes a)...

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ECE 2300 – CIRCUIT ANALYSIS HOMEWORK #2 Notes a) Power terminology: In class we use the terms “delivered” and “absorbed” to indicate the direction of power flow. For example, the battery in a flashlight “delivers” electrical power to the bulb; the bulb “absorbs” electrical power. Nilsson/Riedel uses various terms: “supplied” is equivalent to “delivered”, and “dissipated” is equivalent to “absorbed”. They also use the term “developed” (Prob. 2.13) to mean either case, that is, they want you to calculate the power in each circuit element, and find out whether positive power is delivered or absorbed. Then, take the values of the power expressions for positive power absorbed and add these results. Do the same thing for the power expressions for power delivered. These two sums should be equal. Each sum is equal to the power developed in the circuit. b) In class we defined “ideal” voltage and current sources. Real voltage and current sources (the kind you actually buy or build) do not behave like ideal sources. Nilsson/Riedel refers to “practical constant current” and “practical constant voltage” sources to describe the way real sources behave. The data (tables) in Probs. 2.21 and 2.22 are supposed to have been taken on “real” sources, as opposed to “ideal” sources. Part b) of 2.22 asks you to construct a circuit model of the practical current source, which can be modeled as an ideal current source in parallel with a resistor. A practical voltage source can be modeled as an ideal voltage source in series with a resistor. 1. This problem comes from Dr. Shattuck’s computer-assisted learning project, which is found on the engineering domain at \\Laser\UHCourses\Ece2300\Dr_Dave_Project. Note that this directory cannot be accessed from the web; you will need to access it from the Engineering Computer Center (ECC), or from another location that allows you access to the domain folders. When you find the directory, do the following.

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## This note was uploaded on 09/04/2011 for the course ECE 2300 taught by Professor Staff during the Spring '08 term at University of Houston.

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2300HW02 - ECE 2300 CIRCUIT ANALYSIS HOMEWORK #2 Notes a)...

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