1 (a)
Determine y-parameter for the network.

5 M

1 (b)
The constants of a transmission line are R=6Ω/km, L=2.2 mH/Km.G=0.25×10

Determine the characteristics impedance, propagation constant and attenuation constant at 1 KHZ.

^{-6}℧/km, C=0.005×10^{-6}F/km.Determine the characteristics impedance, propagation constant and attenuation constant at 1 KHZ.

5 M

1 (c)
Test if F(S)=2S

^{6}+4S^{5}+6S^{4}+8S^{3}+6S^{2}+4S+2 is a Hurwitz polynomial.
5 M

1 (d)
The current I(S) in network is given by \[ I(S) = \dfrac {2(S)} {(S+1)(S+2)}. \] Plot the pole-zero pattern in the S-plane and hence obtain i(t).

5 M

2 (a)
Find the current through 10Ω resistor using Norton's theorem.

10 M

2 (b)
Find the current i(t) for t>0.

10 M

3 (a)
Find Foster I and Foster II forms of the driving points function: \[ F(S) = \dfrac {S^3 + 9S^2 + 23S + 15 } {S(S^3+ 12S^2 + 44S + 48)} \]

10 M

3 (b)
Determine ABCD parameters of the network shown:

10 M

4 (a)
A transmission line has a characteristics impedance of 150 Ω and terminated in a load Z

i) VSWR

ii) Reflection coefficient

iii) Input impedance at a distance 0.1λ from the load.

iv) location of first voltage maximum and first voltage minimum from the load.

_{L}=75 - J100&Omega. Using switch chart, findi) VSWR

ii) Reflection coefficient

iii) Input impedance at a distance 0.1λ from the load.

iv) location of first voltage maximum and first voltage minimum from the load.

10 M

4 (b)
Find I

_{2}using mesh analysis.

10 M

5 (a)
For the network shown, capacitor C has an initial voltage V

_{C}(-0) of 10V and at the same instant current in the inductor L is zero. The switch is closed at time t=0. Obtain the expression for voltage V(t) across the inductor L.

10 M

5 (b)
For the network shown, determine \( \dfrac {V1} {I_1} \ and \ \dfrac {V_2} {I_1} \) . Plot the poles and zeros.

10 M

6 (a)
For the network shown, find the equivalent T-network.

10 M

6 (b)
Derive condition for reciprocity in terms of Z parameters and symmetry in terms of h parameters.

10 M

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