Question

Consider the following statements for Norton’s theorem:

1. Short the branch resistance through which current is to be calculated.

2. Obtain the current through this short-circuited branch, using any of the network simplification techniques.

3. Develop Norton’s equivalent circuit by connecting current source I_N with the resistance R_N in series with it

Which of the above statements are correct?

1. 1, 2 and 3
2. 1 and 3 only
3. 1 and 2 only
4. 2 and 3 only

Answer 1

Correct Answer - Option 3 : 1 and 2 only

• Any linear bilateral network can be represented as a current source I_N and resistance R_N in parallel with it.
• Norton’s current is nothing but the short circuit current across the load I.e. short the branch resistance through which current is to be calculated.
• We can obtain the current through this short-circuited branch, using any of the network simplification techniques.
• Norton’s resistance is the equivalent resistance across the load after removing all the independent sources, i.e. short circuit the voltage source and open circuit the current source.