# Questions & Answers of Linear 2-Port Network Parameters

## Weightage of Linear 2-Port Network Parameters

Total 14 Questions have been asked from Linear 2-Port Network Parameters topic of Networks subject in previous GATE papers. Average marks 1.64.

Consider a two-port network with the transmission matrix: $T=\left(\begin{array}{cc}A& B\\ C& D\end{array}\right)$. If the network is reciprocal, then

The z-parameter matrix for the two-port network shown is

where the entries are in Ω. Suppose

Then the value of Rb (in Ω) equals ________

The z-parameter matrix $\begin{bmatrix}z_{11}&z_{12}\\z_{21}&z_{22}\end{bmatrix}$ for the two-port network shown is

The 2-port admittance matrix of the circuit shown is given by

The ABCD parameters of the following 2-port network are

In the h-parameter model of the 2-port network given in the figure shown, the value of h22 (in S) is ______ .

For the two-port network shown in the figure, the impedance (Z) matrix (in Ω) 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

With 10 V dc connected at port A, the current drawn by 7Ω connected at port 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

In the circuit shown below, the network N is described by the following Y matrix:

$Y=\left[\begin{array}{cc}0.1\mathrm{S}& -0.01\mathrm{S}\\ 0.01\mathrm{S}& 0.1\mathrm{S}\end{array}\right]$. The voltage gain $\frac{{V}_{2}}{{V}_{1}}$ is

For the two-port network shown below, the short-circuit admittance parameter matrix is

If the scattering matrix [S] of a two port network is

$\left[\mathrm{s}\right]=\left[\begin{array}{cc}0.2\angle {0}^{o}& 0.9\angle {90}^{o}\\ 0.9\angle {90}^{o}& 0.1\angle {90}^{o}\end{array}\right]$

then the network is

A two-port network shown below is excited by external dc sources. The voltages and the currents are measured with voltmeters V1, V2 and ammeter A1, A2 (all assumed to be ideal), as indicated. Under following switch conditions, the readings obtained are:
i) S1 - Open, S2 - Closed A1 = 0A, V1 = 4.5V, V2 = 1.5V, A2 = 1A
ii) S1 - Closed, S2 - Open A1 = 4A, V1 = 6V, V2 = 6V, A2 = 0A

The z-parameter matrix for this network is