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hw5sol - Carnegie Mellon University Department of...

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Unformatted text preview: Carnegie Mellon University Department of Electrical and Computer Engineering 18-100 Fall 2009 Introduction to Electrical and Computer Engineering Homework 5 - Due Tuesday, October 13, 2009 Problem 1: Rizzoni 9.8,10 points a.) V i =12V, V B =15V, assume diode is conducting, and current I D is counterclockwise ? − ? 10 − ? , ?¡ − ? 5 − = 0 15 − ? 10 Ω − 0.6 − ? 5 Ω − 12 = 0 ? 15 Ω = 2.4 ? = 160 ?¢ Therefore diode is conducting because diode voltage and current is consistent. b.) V i =15V, V B =12V, assume diode is not conducting £ = ? − = 12 − 15 = − 3 ? = 0 ¢ Therefore diode is not conducting. c.) V i =-10V, V B =5V, assume diode is conducting, and current I D is counterclockwise ? − ? 10 − ? , ?¡ − ? 5 − = 0 5 − ? 10 Ω − 0.6 − ? 5 Ω − ( − 10 ) = 0 ? 15 Ω = 14.4 ? = 0.96 ¢ Problem 2: Rizzoni 9.9,10 points Assume diode is not conducting KVL: clockwise current I i (left loop) and I B (right loop) − 5 + ¤ − 5 = 0 12 − 5 Ω + 5 − 5 Ω = 0 10 Ω = 17...
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hw5sol - Carnegie Mellon University Department of...

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