Hall Ticket No Question Paper Code: AEE005
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
B.Tech III Semester End Examinations (Supplementary) February, 2018
Regulation: IARE R16
NETWORK ANALYSIS
(Electrical and Electronics Engineering)
Time: 3 Hours Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. A three phase, balanced delta connected load of 4+j8 Ω is connected across a 400 three phase
balanced supply. Determine the phase currents and line currents. Assume the phase sequence to
be RYB?

Explain in detail the star delta method of solving unbalanced load?
2. The input power to a three phase load is 10 kW at 0.8 pf. Two wattmeters are connected to
measure the power, find the individual readings of the wattmeters?
An unbalanced four wire, star connected load has a balanced voltage of 400V, the loads are
Z1 4+j8
Z2
and Z3 15+j20
Calculate the
Line currents
Current in the neutral wire?
UNIT II
3. In the circuit shown in Figure 1 switch is closed at Find the value of di/dt, d2i/dt2.[7M]
Figure 1
Page 1 of 4
In the circuit shown in Figure switch is open at Find the values of dv/dt, d2v/dt2.

Figure 2
4. Determine the voltage shown in Figure when the switch is opened at t=0 +using Laplace
transform method.
Figure 3
In the network shown in Figure the switch is opened at Find the steady state value of
using Laplace transform method.
Figure 4
UNIT III
5. For the circuit shown in Figure 5 if the reactance is variable, plot the range of I for maximum
and minimum values of XL and maximum power consumed in the circuit?
Figure 5
Page 2 of 4
For the network shown in Figure 6 obtain the transfer functions G21(S) and Z21(S) and the
driving point impedance
Figure 6
6. Draw the locus diagrams for the following
i. Fixed R and variable L circuit
ii. Fixed R and variable C circuit.
Plot the current locus for the circuit with R 50Ohms and Xc 25Ohms with variable C. Find
the power consumed with a supply voltage of 200V, 50HZ.
UNIT IV
7. Determine Y parameters for the following network shown in Figure 7.
Figure 7
Determine the transmission(ABCD) parameters in terms of short circuit(Y) parameters.
8. Two networks are connected in series shown in Figure 8. Obtain the Z-parameters of the combination.
Also verify by direct calculation?
Figure 8
Find the h-parameters of the network shown in Figure
Page 3 of 4
Figure 9
UNIT V
9. Derive the propagation constant of a symmetrical T network.
Design m derived low pass T filter having a cut off frequency of 1kHZ, design impedance of
400ohms and resonant frequency of 1100Hz.
10. Classify the various types of filters and derive the design equations of a K type low pass filter.

Design a k type band stop T filter having design impedance of 600ohms and cut off frequency of
2kHz and 6kHz.