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With 10V dc connected at port A in the linear nonreciprocal two-port network shown below, the following were observed:
(i) 
connected at port B draws a current of 3A
(ii) 
connected at port B draws a current of 2A
For the same network, with 6V dc connected at port A, connected at port B draws 7/3A. If 8V dc connected to port A, the open circuit voltage at port B is
6V
7V
8V
9V
Representing the two port network by its Thevenin Equivalent,
Case-1: 
---------(1)
Case 2: 
----------(2)
From 1 & 2
From equation (1)
The Thevenin Voltage will depend on the applied voltage. Since, the network is linear.
Hence, 
Case-1: 
----------(3)
Case-2: 
----------(4)
Solving (3) and (4) we get,
a = 0.5 and b = 4
When 8V DC Voltage is applied,
