Application of network theorem

• Both the methods are used to solve the complex network.
• Norton's Theorem & Thevenin's Theorem are "Duals". 
•  substitution theorem can be used in both linear and nonlinear circuits. For those nonlinear circuits that have a unique solution, we can use the substitution theorem in the equivalent transformation.
• they can be applied to both ac and dc source.
• For easy detemination of circuit parameter