Consider the following statements: 1. Network theorems are not derivable from Kirchhoff’s law. 2. To get the Norton current, one has to short the current source. 3. Thevenin’s theorem is suitable for a circuit involving voltage sources and series connections. Which of the above statements is/are correct?
Consider the following statements: 1. Network theorems are not derivable from Kirchhoff’s law. 2. To get the Norton current, one has to short the current source. 3. Thevenin’s theorem is suitable for a circuit involving voltage sources and series connections. Which of the above statements is/are correct? Correct Answer 3 only
Kirchoff’s laws i.e. both KCL and KVL are applicable in all lumped circuits. All network theorems are derived from KCL and KVL.
Nortons theorem: A linear bilateral network can be replaced by a single current source (Isc) in parallel with an equivalent impedance Zeq.
When Isc is the short circuit current flows through the load terminals & Zeq is the equivalent impedance across the open terminals of load.
Thevenin theorem: A linear bilateral network can be replaced by a single voltage source (Vth) in series with an equivalent impedance Zeq.
Where Vth is an open circuit voltage across the load terminals and Zeq is the equivalent impedance across the open load terminals.
Thevenin theorem is preferred in a circuit involving voltage source and series connection whereas Norton’s theorem is preferred in the circuits involving current source and parallel connections.
