B.Tech. IV Semester (Main) Examination, June/July - 2015

Electrical En gineering

4F,EZ A Circ uit An alysis-Il

(\Ifr.r-{r+

14r+

Time : 3 Hours

Instructions to Candidates:

Maximum Marks : 80

Min. Passing Marks : 26

Attempt any ftve questions, selecting one question from each unit. All questions

carry equal marks. (Schematic diagrams must be shown wherever necessary.

Any data you feel missing suitably be assumed and stated clearly. Unrts ofquantities used/calculated must be stated clearly.

Unit - IL. Explain the physical interpretation of complex frequency

2. Analysis the circuit on loop current basis & hence find I,,I, & I,

$* lt-,

I 1{liL',J

OR

For the given network determine the transform impedance

{rq *EH

+.IU

I

+

(6)

(10)

(8)1.

J#.q- f r.n *,\rvwsM

4E 4172 lzors (1) [Contd....

1

1.

obtain the transform admittance of the inductor by using time domainreiationship ofvoltage & current

Unit - IIV-(s\

Determine the fi; of network shown below

i-'ri$d

(8)

+Vo

(8)

(16)

(8)

2. Find the time domain response for the network function ftrf #ffi (S)

ORShow the effects of pole position on stability

Check the stability of p(s):sa+2s3+4s2+12s+10

Unit - III

1. obtain foster I & foster II form for z(s) - - -s(s'?

+l)(S'z+ IXS: +9)

OR

(8)

(8)

(8)

(8)

1.

Write down the properties of RC impedance function

Check whether the given function is positive real function or not

Z(s'1= s] + 5sr + 9s + 3

s'+4s'+7s+9Unit - IV

Find the transmission parameters for the given circuit

,h*i

su1,,$-'fI lr

Ua-I\*/*

4E 4172

vr

a1

(2)

-\r. ,,Y#

2.

1.

Derive the condition of reciprocity and symmetry in Zparameters (8)

ORExplain image impedance calculate the value of image impedance ofthe following network

-r* i

;**r-:

/ r!l\[o,

l,* ,

I

V1

+ " l#*'

'{,

C) *1*{-rxv*t

!1-q*i{-

2. Find h - parameters of the network shown in figure

Unit - VDerive the value of characteristic impedance for a T type constant k low pass

filter

Write a short note on active filters

OR

Design a zsection of m-derived Hpf having design impedance of 600ocut off frequency 4kllzand infinite attenuationat3.6Kllz

What do you understand by lattice filter. How a ladder filter network can

be converted into lattice filter. find the cut off frequency for same

(8)

1.

2.

1.

)

(E)

(8)

(E)

(8)

4E 4172 (3)