Nt1310 Unit 8
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Code No: 53021
Set No. 1
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
II B.Tech. I Sem., I Mid-Term Examinations, August – 2012
SIGNALS AND SYSTEMS
Objective Exam
Name: ______________________________ Hall Ticket No.
A
Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 10.
I
Choose the correct alternative:
1.
The relation between a signum function and a unit step function is
( a ) 2u(t)-1
( b ) 2u(t)
( c ) u(t)-u(-t)
( d ) u(t)-1
2.
In a set of signals, if no signal can be represented as a linear combination of the remaining signals, then such signals are
[
]
( a ) linearly independent
( b ) linearly dependent …show more content…
[
]
( c ) triangular function ( d ) sinc function
[
]
( c ) ∑ −∞ Cn ∂ ( w) ( d ) 2π ∑ −∞ Cn ∂ ( nw0 )
∞
∞
[
( c ) X(1/w)
]
( d ) –X(w)
Cont…..2
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Code No: 53021
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:2:
Set No. 1
II
Fill in the blanks:
11.
Double integration of a unit impulse function results in a unit--------- function.
12.
The representation of a function x(t) by a set of infinite mutually orthogonal functions is called -----representation of x(t)
13.
The Fourier spectrum exists only at --------- frequencies.
14.
The transfer function in s-domain is known, the transfer function in frequency domain can be found by replacing s by--------
15.
The Fourier transform of signals which do not satisfy the condition of absolute convergence …show more content…
A system whose magnitude function violates the Paley-Wiener criterion has a ----- impulse response.
18.
Double integration of a unit impulse function results in a unit--------- function.
19.
The representation of a function x(t) by a set of infinite mutually orthogonal functions is called -----representation of x(t)
20.
The Fourier spectrum exists only at --------- frequencies.
D
L
R
O
W
U
T
N
J
-o0o-
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Code No: 53021
Set No. 3
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
II B.Tech. I Sem., I Mid-Term Examinations, August – 2012
SIGNALS AND SYSTEMS
Objective Exam
Name: ______________________________ Hall Ticket No.
A
Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 10.
I
Choose the correct alternative:
1.
If the width τ of a pulse of height unity approaches infinity, then its Fourier transform is equal to
[
]
(a)1
( b ) πδ(w)
( c ) 2πδ(w)
( d ) infinity
2.
The spectrum of a Gaussian signal is
( a ) Gaussian function ( b ) rectangular function
3.
Parseval’s identity states that
(a)
4.
1
2π
∫
∞
www.android.jntuworld.com
www.jwjobs.net
Code No: 53021
Set No. 1
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
II B.Tech. I Sem., I Mid-Term Examinations, August – 2012
SIGNALS AND SYSTEMS
Objective Exam
Name: ______________________________ Hall Ticket No.
A
Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 10.
I
Choose the correct alternative:
1.
The relation between a signum function and a unit step function is
( a ) 2u(t)-1
( b ) 2u(t)
( c ) u(t)-u(-t)
( d ) u(t)-1
2.
In a set of signals, if no signal can be represented as a linear combination of the remaining signals, then such signals are
[
]
( a ) linearly independent
( b ) linearly dependent …show more content…
[
]
( c ) triangular function ( d ) sinc function
[
]
( c ) ∑ −∞ Cn ∂ ( w) ( d ) 2π ∑ −∞ Cn ∂ ( nw0 )
∞
∞
[
( c ) X(1/w)
]
( d ) –X(w)
Cont…..2
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www.jntuworld.com
www.android.jntuworld.com
Code No: 53021
www.jwjobs.net
:2:
Set No. 1
II
Fill in the blanks:
11.
Double integration of a unit impulse function results in a unit--------- function.
12.
The representation of a function x(t) by a set of infinite mutually orthogonal functions is called -----representation of x(t)
13.
The Fourier spectrum exists only at --------- frequencies.
14.
The transfer function in s-domain is known, the transfer function in frequency domain can be found by replacing s by--------
15.
The Fourier transform of signals which do not satisfy the condition of absolute convergence …show more content…
A system whose magnitude function violates the Paley-Wiener criterion has a ----- impulse response.
18.
Double integration of a unit impulse function results in a unit--------- function.
19.
The representation of a function x(t) by a set of infinite mutually orthogonal functions is called -----representation of x(t)
20.
The Fourier spectrum exists only at --------- frequencies.
D
L
R
O
W
U
T
N
J
-o0o-
www.jntuworld.com
www.jntuworld.com
www.android.jntuworld.com
www.jwjobs.net
Code No: 53021
Set No. 3
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
II B.Tech. I Sem., I Mid-Term Examinations, August – 2012
SIGNALS AND SYSTEMS
Objective Exam
Name: ______________________________ Hall Ticket No.
A
Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 10.
I
Choose the correct alternative:
1.
If the width τ of a pulse of height unity approaches infinity, then its Fourier transform is equal to
[
]
(a)1
( b ) πδ(w)
( c ) 2πδ(w)
( d ) infinity
2.
The spectrum of a Gaussian signal is
( a ) Gaussian function ( b ) rectangular function
3.
Parseval’s identity states that
(a)
4.
1
2π
∫
∞