Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 3rd Sem Old 130901 Circuits And Networks Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?III (OLD) EXAMINATION ? WINTER 2018
Subject Code:130901 Date:28/11/2018
Subject Name:Circuits And Networks
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Define self and mutual inductance with dot convection method 07
(b) What is mesh? Determine i1, i2, and i3 using Mesh analysis in shown in Fig1.1 07
Q.2 (a) State, Prove and Summarize conditions for Maximum power transfer in DC
circuit and different case in AC circuit.
07
(b) Compare Thevenin theorem and Norton theorem. 07
OR
(b) Classify DC responce of first order RL and RC circuits 07
Q.3 (a) Analyze time domain responce of source free second order linear networks 07
(b) In the network of figure 3.1, If t=0, switch ?k? is closed. Find the values of i, di/dt
and d2 i/dt2 at t =0+ for element values as follows; V= 100V, R= 1000 and L=
1H.
07
OR
Q.3 (a) Analyze time domain responce of second order linear networks with constant
inputs
07
(b) Consider the R-C circuit shown in fig 3.2, switch ?S? is closed at t=0 and assume
that there is no initial charge in the capacitor. Find the initial conditions i(0+ )
and di(0+ )/dt. Discuss this for RLC series circuit.
07
Q.4 (a) A function in Laplace domain is given by
F(S) = 2(s+4)
(s+3)(s+8)
Find the initial and final value by initial and final value theorem.
07
(b) A 10 volts step voltage is applied across a RC circuit at t=0. Find I(t) at t=0+
and obtain the value of di/dt|t=0+ . Assume R=100?, C=100?F
07
OR
Q.4 (a) The system responce of a function in frequency domain is describe by the
following equation
S
2
F(s) + sF(s) = 2
S
2
Find f(t).
07
(b) A differential equation is represented by
d
2
x -x =e
-t
dt
2
Assuming zero initial condition, find x(t) at t>0
07
Q.5 (a) Derive the condition of reciprocity and symmetry in Z-parameter and 07
(b) Describe cut-set method 07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?III (OLD) EXAMINATION ? WINTER 2018
Subject Code:130901 Date:28/11/2018
Subject Name:Circuits And Networks
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Define self and mutual inductance with dot convection method 07
(b) What is mesh? Determine i1, i2, and i3 using Mesh analysis in shown in Fig1.1 07
Q.2 (a) State, Prove and Summarize conditions for Maximum power transfer in DC
circuit and different case in AC circuit.
07
(b) Compare Thevenin theorem and Norton theorem. 07
OR
(b) Classify DC responce of first order RL and RC circuits 07
Q.3 (a) Analyze time domain responce of source free second order linear networks 07
(b) In the network of figure 3.1, If t=0, switch ?k? is closed. Find the values of i, di/dt
and d2 i/dt2 at t =0+ for element values as follows; V= 100V, R= 1000 and L=
1H.
07
OR
Q.3 (a) Analyze time domain responce of second order linear networks with constant
inputs
07
(b) Consider the R-C circuit shown in fig 3.2, switch ?S? is closed at t=0 and assume
that there is no initial charge in the capacitor. Find the initial conditions i(0+ )
and di(0+ )/dt. Discuss this for RLC series circuit.
07
Q.4 (a) A function in Laplace domain is given by
F(S) = 2(s+4)
(s+3)(s+8)
Find the initial and final value by initial and final value theorem.
07
(b) A 10 volts step voltage is applied across a RC circuit at t=0. Find I(t) at t=0+
and obtain the value of di/dt|t=0+ . Assume R=100?, C=100?F
07
OR
Q.4 (a) The system responce of a function in frequency domain is describe by the
following equation
S
2
F(s) + sF(s) = 2
S
2
Find f(t).
07
(b) A differential equation is represented by
d
2
x -x =e
-t
dt
2
Assuming zero initial condition, find x(t) at t>0
07
Q.5 (a) Derive the condition of reciprocity and symmetry in Z-parameter and 07
(b) Describe cut-set method 07
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2
OR
Q.5 (a) Derive equation of ABCD parameters in terms of h-parameter 07
(b) Describe Tie-set method 07
Fig 1.1
Fig 3.1 Fig 3.2
*************
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This post was last modified on 20 February 2020