The independence looking into nodes 1 and 2 in the given circuit is

If V_A - V_B = 6 V then V_C - V_D is

Assuming both the voltage sources are in phase the value of R for which maximum power is transferred from circuit A to circuit B is

With 10 V dc connected at port A in the linear nonreciprocal two-port network shown below, the following were observed:
(i) 1Ω connected at port B draws a current of 3 A
(ii) 2.5Ω connected at port B draws a current of 2 A

For the same network, with 6 V dc connected at port A, 1Ω connected at port B draws 7/3 A. If 8 V dc is connected to port A, the open circuit voltage at port B is