1. Chapter 2-2 Nodes and Paths KCL and KVL

2. Node A node: is a point where two or more circuit elements meet. Kirchhoff’s Current Law (KCL): This law states that the algebraic sum of the currents at a node must be equal to zero. Our sign convention will be: Assign a negative sign to a current entering a node Assign a positive sign to a current leaving a node

3. i i2i2 i3i3 i1i1

4. Find I 1, I 2, and I 3.

5. Closed Path or Loop A closed path: Starting at an arbitrary node we trace a path through selected circuit elements and return to the original node, without passing through any single point more than once Kirchhoff’s Voltage Law (KVL): states that for any closed loop in a circuit, the algebraic sum of the voltages around the loop must be equal to zero.

8. Find i o and voltage across 50 ohm

9. Find v o using Kirchhoff’s laws and Ohm's law. v s = 10 V

10. Find the value of ia. Given vg = 40 V, Rg = 3 Ω, Ra = 30 Ω, and Rb = 100 Ω

11. Circuits with Dependent Sources

12. Find v o

15. What you should know 1.KCL and KVL 2.Application of them Another View