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Kirchhoff’s Current and Voltage Laws

Kirchhoff’s Current and Voltage Laws. KCL (Kirchhoff’s Current Law). The sum of the currents entering a node equals the sum of the currents exiting a node. Node. Application of KCL. I 1 = 2A. I 3 = 5A. I 2 = 3A. Problem w/KCL. I 1 = ?. I 3 = 250 mA. I 2 = 150 mA.

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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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