Deemed University 2010 B.Tech Electrical and Electronics Engineering University: Lingayas University Term: III Title of the : Network Theory - Question Paper

Roll No. ..

 

Lingayas University, Faridabad

Examination May, 2010

Course: B.Tech. Year: IInd

Semester: III Paper Code: EE-203E

Subject: Network Theory

[Time: 3 Hours] [Max. Marks: 100]

 

Before answering the question, candidate should ensure that they have been supplied the correct and complete question paper. No complaint in this regard, will be entertained after examination.

 

Note: Attempt any Five Questions. Draw neat sketches wherever required.

Q-1 (a) Determine the Y-parameter of Network shown in Fig. (1), considering it a parallel connection of two networks. (10)

(b) Determine the transmission parameter of network shown in fig. (2). Then prove that z parameters do not exist. (10)

Q-2. (a) For the network shown in fig. (3) write the fundamental cut-set matrix and hence obtain the network equilibrium equations on node basis. (10)
P.T.O

(b) Explain following terms with reference to network to pology

(i) Tree (ii) Twig (iii) Oriented Graph (iv) Link (10)

Q-3. (a) Determine the driving point functions for the network shown in fig. (4). (15)

(b) Discuss s-domain network. What are advantages of s-domain network. (5)

Q-4. (a) In series RLC circuit shown in fig. (5), determine the response in the time domain for unit impulse input. (15)

P.T.O

(b) Define and explain the characteristics of

(i) Unit step function

(ii) Unit impulse function (5)

Q-5. Drive the design equations for the elements in band-pass filter section. (10)

(b) Design a prototype band elimination filter sections if design impedance is 400W and cutoff frequencies are 1250Hz and 2000Hz.

(10)

Q-6. (a) Determine foster I and Cauer form I of realization of the driving point impudence function

Z(s) = (10)

(b) State the properties of Hurwitz polynomials. (5)

(c) What is difference between network analysis and network synthesis?

(5)

Q-7. (a) Derive the condition of symmetry for (10)

(i) Y-parameters

(ii) ABCD- parameters

(b) Find the z parameters of the network shown in fig. (6). (10)

 

 

 

 

P.T.O

Q-8. (a) For the given network function, draw pole-zero diagram and hence obtain the time response i(t). (10)

I(s) =

(b) Two port currents of a two port network are given by. (10)

I₁ = 2.5V₁ V₂

I₂ = V₁ + 5 V₂

find equivalent p network.