STUPIDSID
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 V1/l1 and V2/l1 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 I1 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)=s4+s3+5s2+3s+4
(ii) P(s)=s6+6s4+4s2+2
(i) P(s)=s4+s3+5s2+3s+4
(ii) P(s)=s6+6s4+4s2+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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