Understanding Kirchhoff's Laws and Applications
Explore Kirchhoff's voltage and current laws, learn how to apply them in circuits, and solve voltage and current equations to find unknown values. Understand the principles behind Kirchhoff's Laws through detailed examples.
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Presentation Transcript
Kirchhoffs Law Kirchhoff s Law
Kirchhoffs voltage law (KVL) Kirchhoff s voltage law (KVL) The algebraic sum of the voltages around any loop is zero. Supply Voltage = Drop Voltage
Kirchhoffs voltage law (KVL) Kirchhoff s voltage law (KVL) +VR 1 5 + VR 2 15 + VR 3 30 = 0 which can be written as +VR 1 + VR 2 + VR 3 = 5 + 15 + 30= 50 Now suppose that VR 1 and VR 2 are known to be 18 V and 12 V, respectively. Then VR 3 = 20 V.
Kirchhoffs voltage law (KVL) Kirchhoff s voltage law (KVL) Applying our policy for writing KVL equations and traversing the left loop starting at point a, we obtain VR 1 + VR 4 16 24 = 0 The corresponding equation for the right loop starting at point b is VR 2 + VR 3 + 8 + 16 VR 4 = 0 The equation for the outer loop starting at point a is VR 1 + VR 2 + VR 3 + 8 24 = 0
Kirchhoffs voltage law (KVL) Kirchhoff s voltage law (KVL) Find Vae and Vec.
Kirchhoffs current law (KCL) Kirchhoff s current law (KCL) The algebraic sum of the currents entering any node is zero. Incoming current=Outgoing current
Kirchhoffs current law (KCL) Kirchhoff s current law (KCL)
