Interview Question in Superposition
Interview Question :: Superposition theorem
The superposition theorem for electric circuits states that the total current in any branch of a linear circuit equals the algebraic sum of the currents produced by each source acting separately throughout the circuit.
To ascertain the contribution of each individual source, all of the other sources must first be "killed" by:
replacing all other voltage sources with a short circuit (thereby eliminating difference of potential)
replacing all other current sources with an open circuit (thereby eliminating flow of current)
This procedure is followed for each source in turn, then the resultant currents are added to determine the true operation of the circuit. The resultant circuit operation is the superposition of the various voltage and current sources.
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