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THEORY

Nortons Theorem states that “Any linear circuit containing several energy sources and resistances can be replaced by a single Constant Current generator in parallel with a Single Resistor“. Norton on the other hand reduces his circuit down to a single resistance in parallel with a constant current source.

As far as the load resistance, RL is concerned this single resistance, RNorton is the value of the resistance looking back into the network with all the current sources open circuited and INorton is the short circuit current at the output terminals.

The basic procedure for solving a circuit using Nortons Theorem is as follows:

  • 1. Remove the load resistor RL or component concerned.
  • 2. Find RNorton by shorting all voltage sources or by open circuiting all the current sources.
  • 3. Find INorton by placing a shorting link on the output terminals A and B.
  • 4. Find the current flowing through the load resistor RL.

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    • Govt. Engineering College Palakkad, Sreekrishnapuram-678633, Kerala, India.
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    • principal@gecskp.ac.in
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