4 Kirchhoff's Laws

# 4 Kirchhoff's Laws - ECE 110 M-C Brunet Circuit analysis...

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ECE 110 M.-C. Brunet Kirchhoff’s Laws (KVL, KCL) Handout 4 Circuit analysis : Find voltage across and current through all components. Basic circuit laws Kirchhoff (KVL, KCL) Ohm M.-C. BRUNET ECE 110 UIUC 4.1

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ECE 110 M.-C. Brunet Kirchhoff’s Laws (KVL, KCL) Handout 4 Try These!! Element AB -V + 1 V = V A -V B V = V B A ? 2 V –V B + V B C + V C = _____ ? + - 2 v 1 , v 2 known v 2 3 3 1 v 1 + - v 3 + - v 3 = _____ ? M.-C. BRUNET ECE 110 UIUC 4.2 NODES l t h i ) Node: all points connected by a wire ( same voltage anywhere on wire) Example 1 : How many nodes? A C BD + - v + - v A) Example 2 : How many nodes? 2 4 3 1 5 B) 3 4 2 M.-C. BRUNET ECE 110 UIUC 4.3 1 5
ECE 110 M.-C. Brunet Kirchhoff’s Laws (KVL, KCL) Handout 4 Kirchhoff Voltage Law (KVL) In any closed path: Σ all voltages = 0 Example 3 : + V + (a) + (b) V + 1 2 3 - v 1 - 8V + 5V - 2 3 - v 1 + 5V - - 8V M.-C. BRUNET ECE 110 UIUC 4.4

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ECE 110 M.-C. Brunet Kirchhoff’s Laws (KVL, KCL) Handout 4 Other version of KVL The voltage drop from one node to another is the same regardless of the path to calculate this drop.
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4 Kirchhoff's Laws - ECE 110 M-C Brunet Circuit analysis...

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