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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
I1 = 2A
I2 = 3A
I3 = 5A
I1 = ?
I2 = 150 mA
I3 = 250 mA
Problem w/KCL
KVL (Kirchhoff’s Voltage Law)
The sum of the potential differences around a
closed loop equals zero.
Closed Loop #1
Closed Loop #2
Closed Loop #3
Closed Loop #4
Not Closed #1
Not Closed #2
What KVL Really Means
Sum of the Voltage drops across resistors equals the Supply Voltage in a Loop.
KVL #1
KVL #2
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