Download PTU B.Tech 2021 Jan EE 3rd Sem 76381 Electrical Circuit Analysis Question Paper

Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January EE 3rd Sem 76381 Electrical Circuit Analysis Previous Question Paper

Roll No.
Total No. of Pages : 03
Total No. of Questions : 18
B.Tech. (EE) (2018 Batch) (Sem.?3)
ELECTRICAL CIRCUIT ANALYSIS
Subject Code : BTEE-301-18
M.Code : 76381
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1.
State Thevenin's theorem.
2.
What do you mean by dependent sources? Explain.
3.
Discuss the significance of phasor diagrams.
4.
What do you mean by steady state response? Explain.
5.
Differentiate between passband and stop band.
6.
What do you mean by network functions? Explain.
7.
What is the significance of two port networks? Explain.
8.
List the advantages of m-derived filters.
9.
What do you mean by poles and zeros? Explain.
10. What is the need of Laplace transform? Discuss.
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SECTION-B
11. Calculate the current throught the resistors and through the voltage source of the circuit
shown below by the principle of superposition.
2
I = 3A
+
4
3
6V ?
FIG.1
12. Design a constant-K low pass filter to be terminated in 600 ohm, having a cut-off
frequency of 3kHz. Determine :
a) The frequency at which the filter offers attenuation of 17.372 dB.
b) Attenuation at 6kHz.
13. A series RLC circuit has R = 25 ohm, L = 0.04 H, C = 0.01F. Calculate the resonant
frequency. If a 1 V source of same frequency as a frequency of resonance is applied to this
circuit, calculate the frequencies at which the voltage across L and C are maximum. Also
calculate the voltages.
14. For the given polynomial F(s) = s6 + 5s5 + 11s4 + 25s3 + 36s2 + 30s + 36. Determine the
stability of the system using Routh-Hurwitz stability criterion.
15. Find the current i(t) in a series RL circuit shown in the figure using Laplace transform. The
switch K is closed at t = 0.
t = 0
K
R
V
i (t)
L
FIG.2
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SECTION-C
16. Synthesize first & second the Foster and Cauer forms of the LC driving point impedance
2
s
1 2
s 16
function
.
s 2
s 4
17. For the network shown in figure drive the open circuit impedance and short circuit
admittance parameters also draw their equivalent circuits.
I1
I2
1
2
2
2
V1
1
2
V2
1
2
FIG.3
18. Discuss the following :
a) Reciprocity theorem
b) Norton's theorem
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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