Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (EEE)- Electrical And Electronics Engineering 2020 December 3rd Sem 76463 Electrical Circuit Analysis Previous Question Paper
Roll No.
Total No. of Pages : 03
Total No. of Questions : 18
B.Tech. (Electrical & Electronics Engg. / Electronics & Electrical)
(2018 Batch) (Sem.?3)
ELECTRICAL CIRCUIT ANALYSIS
Subject Code : BTEEE-301-18
M.Code : 76463
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
Write briefly :
Q1 State Reciprocity Theorem and its application.
Q2 What is coefficient of coupling?
Q3 Write various applications of filters?
Q4 What are open circuit parameters? Give the equivalent circuit.
Q5 State advantages of 3-phase machines over 1-phase machines.
Q6 The coupled coil with L1 = 3H, L2 = 1mH and K = 0.5 are connected in series additive
arrangement. Calculate the equivalent inductance.
Q7 What do you mean by duality network?
Q8 What is the difference between network synthesis and network analysis?
Q9 Give the condition for selecting the resonant frequency in m-derived high pass and
low-pass filters.
Q10 What do you mean by immittance?
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SECTION-B
Q11 For the given two port network calculate the short circuit parameters of Fig. 1.
I1
1
3
I2
1
2
3
6
1
2
FIG.1
Q12 Find current in 5 resistance in the magnetically coupled circuit of Fig. 2.
j2
j5
j10
3
5
100V I?
I
?j2
1
I2
FIG.2
Q13 Determine the current delivered by 54V source for the circuit shown using nodal analysis
of Fig. 3.
10
2
1A
10
54V
12V
FIG.3
Q14 Find i1(t) in Fig. 4 if switch is closed at t = 0 and the inductors are unenergized initially.
S
10
t = 0
10
10
100 V
1H
2H
FIG. 4
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2
2s 2s 1
Q15 Test for positive realness F s
.
3
2
s 2s s 2
SECTION-C
Q16 The driving point impedance is given by :
2
s 4 2
s 25
Z s 8
s 2
s 16
Obtain the Foster-I and Foster-II networks.
Q17 Design a m-derived T and -network low pass filter with nominal characteristic impedance
R0 = 600, having cut-off frequency of 1.8KHz and infinite attenuation f = 2KHz.
Q18 Describe the following :
a) Represent sine function as rotating phasor.
b) Derive all characteristics of constant K High Pass and Band Pass filter.
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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This post was last modified on 13 February 2021