1 (a)
Find the current through 15? resistor

4 M

1 (b)
Obtain the voltage response of series R-L circuit

4 M

1 (c)
Determine V

_{1}/l_{1}and V_{2}/l_{1}for the given network

4 M

1 (d)
What are standing waves? Define reflection coefficient and VSWR of a transmission line

4 M

1 (e)
A ?-section filter network consist of a series arm conductor of 20 mH and two shunt arm capacitor of 160 nF each.

Calculate : (i) cut off frequency (ii) attenuation (iii) Phase shift at 15kHz.

Also obtain the impedance in pass-band

Calculate : (i) cut off frequency (ii) attenuation (iii) Phase shift at 15kHz.

Also obtain the impedance in pass-band

4 M

2 (a)
Find I

_{1}through 10? by Thevinin's theorem

6 M

2 (b)
Find Ic and Vc for t>o

8 M

2 (c)
Use Nodal analysis to find the voltage drop across 4? and 10? ref Qu. 2(a)

6 M

3 (a)
Design a single stub match for a load of 150? + j232.5? for 75? line at 500MHz using Smith Chart

8 M

3 (b)
Compare foster realization with caurer realizations

8 M

3 (c)
State the properties of Hurwitz polynomial

4 M

4 (a)
Define T-parameters and relate them to other parameter as indicated.

(i) A and C interms of z-parameters

(ii) B interms of y-parameters

(iii) D interms of h-parameter

(i) A and C interms of z-parameters

(ii) B interms of y-parameters

(iii) D interms of h-parameter

8 M

4 (b)
Test whether the following functions are positive real functions with proper reasons.

\[F_1\left(s\right)=\frac{2s^3+2s^2+3s+2}{s^2+1}\]

\[F_2\left(s\right)=\frac{s^2+1}{s\left(s^2+4\right)}\]

\[F_1\left(s\right)=\frac{2s^3+2s^2+3s+2}{s^2+1}\]

\[F_2\left(s\right)=\frac{s^2+1}{s\left(s^2+4\right)}\]

12 M

5 (a)
What are scattering parameters? State their properties

6 M

5 (b)
Derive an expression of m-derived ? section network starting from a constant k section

6 M

5 (c)
For given circuit,
switch 's' is opened at t=0. switch 's' was on for long time.
Determine
\[V_L\left(0^+\right),\frac{dV_L}{dt}\left(0^+\right)\ and\frac{d^2V_L}{dt^2}\left(0^+\right)\]

8 M

6 (a)
Explain the graphical representation of series resonance circuit

6 M

6 (b)
Test whether following polynomials are Hurwitz

(i) P(s)=s

(ii) P(s)=s

(i) P(s)=s

^{4}+s^{3}+5s^{2}+3s+4(ii) P(s)=s

^{6}+6s^{4}+4s^{2}+2
8 M

6 (c)
Find the characteristics impedance, cut off frequency and pass band for the network shown :

6 M

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