1 (a)
The constants of a transmission lines are R=6/km, L=2.2mH/km
G=0.25×10-6 mho/km C=0.005×10-5 F/km
Determine the characteristic impedance propagation constant phase constant and attenuation constant at 1 KHz.
G=0.25×10-6 mho/km C=0.005×10-5 F/km
Determine the characteristic impedance propagation constant phase constant and attenuation constant at 1 KHz.
5 M
1 (b)
Obtain the expression for i(t) if switch is closed at t=0 If v(t) is i(t) = ramp signal
5 M
1 (c)
Check whether the polynomial is Hurwitz or not by continued fraction method. F(S)=S4+S3+4S2+2S+3.
5 M
1 (d)
Find out for the following n/w given below.
5 M
2 (a)
Find the voltage across 5Ω resistor in the network shown below. If K=0.8 is coefficient of coupling.
8 M
2 (b)
In the circuit shown, find out the expression for voltage V(t) across capacitor for t>0 At t=0 Switch is closed.
8 M
2 (c)
Define ABCD parameters for the two port network hence obtain condition for symmetry.
4 M
3 (a)
Find in the circuit given below. Switch is changed from position 1 to 2 at t=0.
6 M
3 (b)
Compare and Obtain Foster I and Foster II of the following RC impedance function.
8 M
3 (c)
Obtain Cauer form I of LC network
6 M
4 (a)
Derive the characteristic equation of a transmission line also obtain α β γ of the transmission line.
8 M
4 (b)
Derive the relation for nominal impedance and cut off frequency for a constant k low pass filter.
4 M
4 (c)
A network and its pole zero diagram are shown in fig. Determine the values of R, , C if Z(0)=1.
8 M
5 (a)
Check whether the following functions are PRF or not
8 M
5 (b)
Find the current Ix using superposition theorem.
6 M
5 (c)
The current plot the pole zero pattern in s-plane hence obtain i(t) by finding out residues by graphical method.
6 M
6 (a)
The characteristics impedance of a high frequency line is 100Ω. If it is terminated by a load impedance of 100 +j100Ω. Using smith chart find out (i) VSWR
(ii) Refection coefficient (iii) Impedance at of wavelength away from load (iv) VSWR minimum and VSWR maximum away from the load.
(ii) Refection coefficient (iii) Impedance at of wavelength away from load (iv) VSWR minimum and VSWR maximum away from the load.
8 M
6 (b)
For the network shown and find out
6 M
6 (c)
Find out Thevenin's equivalent network.
6 M
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