Notions of quadripoles (two port networks, or four terminal networks)
A quadripole is a system with two inputs, each one has two poles. A quadripole allows an energy transfer between two dipoles connected to either input.
The description of a dipole requires the use of four physical quantities:
The voltage drop across each input,
the current entering each input.
Exemple : Example
The single phase electrical transformer is a quadripole.
