With these in mind, we apply the superposition principle in three steps:ġ.Turn off all independent sources except one source. This way we obtain a simpler and more manageable circuit.Ģ.Dependent sources are left intact because they are controlled by circuit variables. This implies that we replace every voltage source by 0 V (or a short circuit), and every current source by 0 A (or an open circuit). However, to apply the superposition principle, we must keep two things in mind:ġ.We consider one independent source at a time while all other independent sources are turned off. The principle of superposition helps us to analyze a linear circuit with more than one independent source by calculating the contribution of each independent source separately. The superposition principle states that the voltage across (or currents through) an element in a linear circuit is the algebraic sum of the voltages across (or currents through) that element due to each independent source acting alone. The idea of superposition rests on the linearity property. These circuit analysis theorems are classified as: Make sure to read what is electric circuit first. The latter approach is known as superposition. If a circuit has two or more independent sources, one way to determine the value of a specific variable (voltage or current) is to use nodal or mesh analysis like has been discussed before.Īnother way is to determine the contribution of each independent source to the variable and then add them up. Superposition theorem will help us greatly when analyzing a circuit with multiple sources.
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