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Code: 13A04101
Time: 3 hours
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B.Tech I Year (R13) Supplementary Examinations December 2017
NETWORK ANALYSIS
(Common to ECE & EIE)
Max. Marks: 70
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PART - A
(Compulsory Question)
1 Answer the following: (10 X 02 = 20 Marks)
(a) Distinguish between a Branch and a node of a circuit.
(b) State Thevenin's theorem.
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(c) What is meant by poles and zeros?
(d) Write a note on free and forced responses.
(e) What are the conditions for resonance?
(f) Express Z-parameters in terms of the h-parameters.
(g) What is meant by quality factor?
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(h) Define state variable.
(i) Discuss the drawbacks of constant k- low pass filter.
(j) Define band elimination filter.
PART - B
(Answer all five units, 5 X 10 = 50 Marks)
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UNIT - I
2 (a) Explain the properties of incidence matrix.
(b) Find the Norton equivalent of the following circuit by taking 2 O resistance as load.
| R1 4 O --- Content provided by FirstRanker.com --- B1 28 V | R2 (Load) 2O | R3 --- Content provided by FirstRanker.com --- 1O B2 7 V |
OR
3 (a) Explain the terms: (i) Cut set and Cut – set schedule. (ii) Tie set.
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(b) Using the superposition theorem, determine the voltage drop and current across the resistor 3.3 kO as shown in figure below.
| 2.0?O 4.7?O + --- Content provided by FirstRanker.com --- | + 3.3?O VR | + 5V --- Content provided by FirstRanker.com --- |
Code: 13A04101
UNIT - II
4 Explain sinusoidal response of series RLC circuit with circuit diagram, phasor diagram and waveforms with mathematical expressions.
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OR
5 Explain in detail about instantaneous power, average power, apparent power and power factor.
UNIT - III
6 (a) Compare series resonance and parallel resonance circuits.
(b) A sinusoidal voltage V(t) = (200v)sinwt is applied to a series RLC circuit with R = 20 O, L = 10mH, C = 100nF. Find the following quantities: (i) The resonant frequency. (ii) The amplitude e of the current at resonance. (iii) The quality factor of the circuit.
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OR
7 (a) Obtain an expression for coefficient of coupling.
(b) Two similar coils connected in series gave a total inductance of 600mH and when one of the coil is reversed, the total inductance is 300mH. Determine the mutual inductance between the coils and coefficient of coupling.
UNIT - IV
8 The Z parameters of two port network are Z11 = 20 O, ?22 = 30 O, ?12 = Z21 = 10 O. Find Y parameters and ABCD parameters of the network.
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OR
9 (a) Explain the advantages of state variable analysis.
(b) Derive the State and Output equations.
UNIT - V
10 (a) Explain in detail about characteristics impedance and propagation constant of symmetric T-network.
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(b) Explain in detail about pass band, stop band and cut off frequency of filters.
OR
11 Design 'm' derived low pass T-section filter having cut-off frequency of 1000 Hz. Design impedance Ro = 500 O and Resonant frequency of 1200 Hz.
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