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Kirchhoff’s Current and Voltage Laws

Learn how Kirchhoff's Current Law (KCL) and Voltage Law (KVL) apply in circuits. Discover how to solve problems using KCL and KVL. Explore the concepts of current conservation and voltage drops in circuits.

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Kirchhoff’s Current and Voltage Laws

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  1. Kirchhoff’s Current and Voltage Laws

  2. KCL (Kirchhoff’s Current Law) The sum of the currents entering a node equals the sum of the currents exiting a node.

  3. Node

  4. Application of KCL I1 = 2A I3 = 5A I2 = 3A

  5. Problem w/KCL I1 = ? I3 = 250 mA I2 = 150 mA

  6. KVL (Kirchhoff’s Voltage Law) The sum of the potential differences around a closed loop equals zero.

  7. Closed Loop #1

  8. Closed Loop #2

  9. Closed Loop #3

  10. Closed Loop #4

  11. Not Closed #1

  12. Not Closed #2

  13. What KVL Really Means Sum of the Voltage drops across resistors equals the Supply Voltage in a Loop.

  14. KVL #1

  15. KVL #2

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