duality of network

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Explain the duality of network with example. 

A dual of a relationship  is one  in which current and voltage are interchangeable two networks are dual to each other if one has mesh equation numerically identical to others node equation . 
According to duality of network there are some dual pairs:
Elements            Dual elements
voltage                current 
short circuit        open circuit
 series                  parallel 
Norton                 Thevenin 
resistance           conductance
 impedance         admittance
 KVL                     KCL 
capacitance        inductance

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