4 - Examples of KCL and or KVL (Supplement)

4 Examples of KCL - ELEC300V ELEC300V Fall 2008 2008 Lecture 4 supplement Examples of KCL/KVL of KCL/KVL Nodes and Loops Node all points connected

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LEC300V all 2008 ELEC300V – Fall 2008 Lecture 4 supplement xamples of KCL/KVL Examples of KCL/KVL
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Nodes and Loops Node: all points connected by a wire, has the same voltage anywhere on the wire 1 Node 1 Node 2 ode 1 R1 R2 + R1 + Node 1 Node 2 R3 1 loop Loop 1 Loop 2 - V Node 3 R - V Node 3 Loop 3 Circuit Branch: circuit element between 2 nodes
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CL and KVL KCL and KVL • Kirchhoff’s Current Law (KCL) : For every node 0 0 0 " " " " " " " " leaving entering leaving entering i or i or i i • Kirchhoff’s voltage law (KVL)– For a loop j _ _ i all i all j loop i branch V i i branch _ _ 0 _ + - R1 R2 + loop V 1 - 0 2 1 0 V V V - V 1 loop V 0 V 2 + * KVL also means the voltage drop from one node to another is the same regardless of the path use for the calculation of the voltage drop
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xample of KVL (Single Loop) Example of KVL (Single Loop) V R1 + +- V + 8V A B C Applying KVL: V V V V 0 R2 - V 24V V AB +V BC +V CD +V DE +V EA = 0 => V AB +8+V CD +V DE -24 = 0 R3 - -+ D E If V AB = 9V and V CD = 5V, what is V DE ?
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This note was uploaded on 01/28/2011 for the course ELEC 300V taught by Professor C.ytsuiandmansunchan during the Fall '08 term at HKUST.

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4 Examples of KCL - ELEC300V ELEC300V Fall 2008 2008 Lecture 4 supplement Examples of KCL/KVL of KCL/KVL Nodes and Loops Node all points connected

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