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BARC ECE 2019 :Signals Nuclear Quiz 2
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Question 1
A signal m(t) with bandwidth 500 Hz is first multiplied by a signal g(t) where 
The resulting signal is then passed through an ideal lowpass filter with bandwidth 1 kHz. The output of the lowpass filter would be:
Question 2
The Dirac delta function δ(t) is defined as
Question 3
A signal x(n) = sin (ω0 n + φ) is the input to a linear time invariant system having a frequency response 
. If the output of the system is Axn-n0), then the most general form of 
will be
. If the output of the system is Axn-n0), then the most general form of will be Question 4
For the discrete-time system shown in the figure, the poles of the system transfer function are located at
Question 5
Let 
and 
be the Fourier transform of 
. Then 
is
and be the Fourier transform of . Then is Question 6
The unit-step response of a system starting from rest is given by c(t) = 1-e-2t for t ≥ 0.
The transfer function of the system is:
The transfer function of the system is:
Question 7
A system with input x[n] and output y[n] is given as 
. The system is:
. The system is: Question 8
A system with input x(t) and output y(t) is defined by the input-out relation:
The system will be
The system will be
Question 9
For a signal x(t) the Fourier transform is X(f). Then the inverse Fourier transform of X(3f + 2) is given by
Question 10
If the region of convergence of x1[n] + x2[n] is 
then the region of convergence of x1[n] – x2[n] includes
then the region of convergence of x1[n] – x2[n] includes - 599 attempts
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