Post on 22-Jan-2018
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Network Analysis and Synthesis
By:
Prateek Saxena
Asst Professor
ECE Department
RVIT College, Bijnor
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MODULE-I
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1. Basics of Networks related terms
2. Different types of Signal and
Systems
3
QUESTION-1
In Linear circuit ,when the ac is doubled ,the ac output becomes
a. one-fourth
b. Half
c. Two times
d. Four times
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Answer- C
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QUESTION-2
A network is said to be linear if and only if
a. A response is proportional to the excitation function
b. The principle of superposition applies
c. The principle of homogeneity applied
d. Both the principle (ii) and (iii) apply
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Answer - D
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QUESTION-3
The elements which are not capable of delivering energy by
their own are known as
a. Unilateral elements
b. Non-linear elements
c. Passive elements
d. Active elements
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Answer - C
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QUESTION-4
A component that opposes the change in circuit voltage is
a. Resistance
b. Capacitance
c. Inductance
d. conductance
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Answer- B
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QUESTION-5
An excitation is applied to a system at t=T and its response
is zero for -∞ < t < T . Such a system is a/an
a. non-causal system
b. Stable system
c. Causal system
d. Unstable system
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Answer- C
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QUESTION-6
The V-I characteristic of an element is shown below .The element is v
i
a. non-linear,active,non-bilateral
b. Linear,active,non-bilateral
c. Non-linear,passive,non-bilateral
d. Non-linear,active,bilateral
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Answer-B
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QUESTION-7
For a DC voltage an Inductor
a. Is virtually a short circuit
b. Is an open circuit
c. Depends on polarity
d. Depends on voltage value
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Answer- A
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QUESTION -8
Which signal can have infinite number of values in a range
a) Analog
b) Digital
c) a or b
d) None of the above
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
Answer-A
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION -9
If the energy is supplied from a source ,whose resistance is 1
ohm to a load of 100 ohm the source will be
a) A voltage source
b) A current source
c) Both of the above
d) None of the above
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Answer -A
21
QUESTION-10
A circuit having an emf source or any energy source is/an
a. Active circuit
b. Passive circuit
c. Unilateral circuit
d. Bilateral circuit
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Answer - A
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QUESTION-11
A network N is a dual network N if
a. Both of them have same mesh equation
b. Both of them have same node equation
c. Mesh equation of one of them are node equation of other
d. None of the above
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Answer- C
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QUESTION-12
What is the function of ramp signal at t >∞
a. 1
b. kt
c. 0
d. k
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Answer- B
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QUESTION-13
Impulse signal function is also known as
a. Delta function
b. Dirac delta function
c. Delta dirac function
d. Both (a) and (b)
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Answer- D
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QUESTION-14
The output y(t) and the input x(t) of a system are related by
the equation y(t)= mx(t)+c, where m and c are constants. The
system is
a. Linear
b. Non-linear
c. May be linear or non –linear depending on y(t) and x(t)
d. None of the above
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Answer- B
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QUESTION-15
The internal impedance of ideal current source is
a. Zero
b. Infinite
c. Both (i) and (ii)
d. None of the above
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Answer- B
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QUESTION-16
An ideal voltage source charge an ideal capacitor
a. In infinite time
b. Exponentially
c. Instantaneously
d. None of the above
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Answer- C
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QUESTION-17
There are two wires A and B . A is 20 times longer than B
and has half the cross section of that of B . If the resistance
of B is 1Ω,the resistance of A will be
a. 40Ω
b. 1/40Ω
c. 20 Ω
d. 10 Ω
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Answer- A
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One coulomb charge is equal to the charge on
(a) 6.24 x 10^-18 electrons
(b) 6.24 x 10^24 electrons
(c) 6.24 x 10^18 atoms
(d) 6.24 X 10 ^ -24
QUESTION-18
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
Answer-A
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION-19
Energy stored in a Capacitor is
a) ¼ CV^2
b) 1/2CV^2
c) 0
d)0
1/ 2C
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
Answer-B
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION-20
Two resistors R1 and R2 give combined resistance of 4.5Ω when
in series and 1Ω when in parallel. The resistance are
a) 2Ω and 2.5Ω
b) 1Ω and 3.5Ω
c) 1.5Ω and 3.5Ω
d) 4Ω and 0.5Ω
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Answer- C
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION-21
Which mathematical notation specifies the condition of
periodicity for a continuous time signal
a) X(t) = x(t+To)
b) X(n) = x(n+No)
c) X(t) = e^-at
d) None of the above
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
Answer-A
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R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION -22
Which signals can have only a limited number of values
a) Analog
b) Digital
c) A or b
d) None of the above
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Answer-B
QUESTION-23
Damped sinusoids are
a) Sinusoid signals multiplied by growing exponents
b) Sinusoid signals divided by growing exponentials
c) Sinusoid signals multiplied by decaying exponentials
d) Sinusoid signals divided by decaying exponentials
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Answer- C
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QUESTION -24
For which channel we need to use the shanon capacity to find
the maximum bit rate
a) Noisy
b) Noiseless
c) Bandpass
d) Low pass
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Answer-A
QUESTION-25
A system is said to be shift invariant only if
a) A shift in the input signal also results in the corresponding shift in the
output
b) A shift in the input signal does not exhibit the corresponding shift in the
output
c) A shifting level does not vary in an input as well as output
d) A shifting at input does not affect the output
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Answer-A
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QUESTION-26
Under which condition does an initially relaxed system
become unstable
a) Only if bounded inputs generate unbounded output
b) Only if bounded inputs generate bounded output
c) Only if unbounded input generates unbounded output
d) Onlu if unbounded input generates bounded output
e)
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Answer- A
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION-27
Which among the following are the stable discrete time systems
1. Y(n) = x(4n)
2. Y(n) = x(-n)
3. Y(n) = ax(n)+8
4. Y(n) = cos x(n)
a) 1&3
b) 2&4
c) 1,3&4
d) All of the above
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Answer-D
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION-28
An equalizer used to compensate the distortion in the
communication system by faithful recovery of an original
signal is nothing but an illustration of
a) Static system
b) Dynamic system
c) Invertible system
d) None of the above
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Answer-C
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION-29
The graphical representation of a signal in the time domain is known
as
a) Frequency
b) Waveform
c) Frequency response
d) None of the above
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R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
Answer-A
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
A random signal is a signal which
a) Has uncertainity
b) Has no uncertainity
c) Is a completely specified function of time
d) None of the above
QUESTION -30
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION -31
………….. Data have discrete states and take discrete value
Analog
Digital
a or b
None of the above
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Answer-B
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QUESTION-32
The V-I characteristic of a resistor is i=2v^2. The resistor is
a. Linear , passive, bilateral
b. Non-linear , passive , bilateral
c. Non-linear , active , bilateral
d. Non-linear , active ,unilateral
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Answer- B
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION-33
Which property of delta function indicates the equality between
the area under the product of function with shifted impulse and the
value of function located at unit impulse instant
a) Replication
b) Sampling
c) Scaling
d) Product
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Answer-B
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QUESTION -34
Frequency and periods are
a) Inverse of each other
b) Proportional to each other
c) The same
d) None of the above
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Answer-A
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QUESTION -35
What is the rate of change with respect to time
a) Amplitude
b) Time
c) Frequency
d) voltage
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
Answer-C
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QUESTION -36
Which of the following describe the position of the
waveform relative to time 0
a) Frequency
b) Phase
c) Amplitude
d) Voltage
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Answer-B
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QUESTION -37
A sine wave in the …………. Domain can be represent by one
signal spike in the …………. domain
a) Time:frequency
b) Frequency:time
c) Time:phase
d) Phase :time
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Answer-A
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QUESTION -38
A……sine wave is not useful in data communication; we
need to send a … signal
a) Composite ; single-frequency
b) Single ; frequency-composite
c) Single-frequency; double-frequency
d) None of the above
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Answer-B
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QUESTION -39
The …………. Of a composite signal is the difference between the
highest and the lowest frequencies contained in that signal
a) Frequency
b) Period
c) Bandwidth
d) Amplitude
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Answer-C
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
Baseband transmission of a digital signal is possible only if we
have a …………channel
QUESTION -40
a) Low pass
b) Bandpass
c) Low rate
d) High rate
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Answer-A
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QUESTION -41
If the available channel is a …………. Channel ,we cannot send
a digital signal directly to the channel
a) Low pass
b) Band pass
c) Low rate
d) High rate
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Answer-B
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION -42
For a ………….. Channel , the nyquist bit rate formula defines
the theoretical bit rate .
a) Noisy
b) Noiseless
c) Bandpass
d) Low pass
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Answer-B
QUESTION-43
An amplitude of sinc function that passes through zero at
multiple values of an independent variable ‘x’
a) Decrease with an increase in the magnitude of an independent variable (x)
b) Increase with an increase in the magnitude of an independent variable(x)
c) Always remain constant irrespective of variation in magnitude of ‘x’
d) Cannot be define
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Answer-A
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QUESTION -44
The following product defines the number of bit that can fill the link
a) Bandwidth - period
b) Frequency-amplitude
c) Bandwidth - delay
d) Delay-amplitude
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Answer- C
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION -45
The circuits whose properties are same in either direction is known
as
a) Unilateral circuit
b) Bilateral circuit
c) Irreversible circuit
d) Reversible circuit
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Answer- B
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QUESTION -46
Which of the following is not a non linear element
a) Gas diode
b) Heater coil
c) Tunnel diode
d) Electric arc
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Answer-
R.V. INSTITUTE OF TECHNOLOGYApproved by UGC & AICTE New Delhi, Affiliated to UPTU & BTE Lucknow
QUESTION -47
Which of the following is the passive element
a) Capacitance
b) Ideal current source
c) Ideal voltage source
d) All of the above
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Answer- C
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QUESTION -48
Which of the following is a bilateral element
a) Constant current source
b) Constant voltage source
c) Capacitance
d) None of the above
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Answer- C
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QUESTION -49
The circuit has resistors ,capacitors and semi-conductor diodes . The
circuit will be known as
a) Non linear circuit
b) Linear circuit
c) Bilateral circuit
d) None of the above
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Answer - A
100
QUESTION-50
Which of the following represent a stable system?
a. Impulse response of the system decrease exponentially
b. Area within the impulse response is finite
c. Eigen values of the systems are positive and real
d. Roots of the characteristic equations of the system are real and
negative
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Answer- B
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&
All The Best