Lecture2010-3

# Lecture2010-3 - Chapter 3 Resistive Circuits Circuits With...

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Chapter 3 – Resistive Circuits

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Circuits With Multiple Resistors Resistors in Series; ( R1SR2SR3… ) Minimize number of variables Single loop, one current eq R I R R R I V = + + + = ...) ( 3 2 1
Equivalent Circuit More resistors in series, less current Sum of voltages = total voltage drop Resistors as voltage divider or attenuator ... 3 2 1 + + + = R R R R eq

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Concept of Equivalent Circuit What is in the box? Can’t tell the difference from external measurements
Circuits With Multiple Resistors Resistors in Parallel ( R1PR2PR3… ) One voltage, multiple current paths ... 3 2 1 + + + = R V R V R V I

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Equivalent Circuit More resistors, more current Sum of current = total current Resistors to split current or share load ... 1 1 1 1 3 2 1 + + + = R R R R eq
Resistors in Series and in Parallel Partition the Circuit Start from Far End Group Resistors in a Smart Way

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Summary Partition Circuit into Manageable Sections Series or Parallel Series: Parallel: Solve the Equivalent Circuit Trace Backward and Derive Individual Quantities ... 3 2 1 + + + = R R R R eq ... 1 1 1 1 3 2 1 + + + = R R R R eq

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Another Exercise
Procedure 10S6=16 16P64=12.8 12.8S7.2=20 20P30=12 V=IxReq=5x12=60 V I30=60/30=2 A I7.2=5-2=3 A V64=60-3x7.2=38.4 V

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Resistance Conductance Conductors in series? Conductors in parallel?
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## This document was uploaded on 06/11/2010.

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Lecture2010-3 - Chapter 3 Resistive Circuits Circuits With...

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