WorksheetsDSP Event
Total questions: 15
Worksheet time: 40mins
The RMS value of the periodic waveform e(t), shown in figure is
sq.root(3/2) A
sq.root(1/3) A
sq.root(2/3) A
sq.root(2) A
Z.T of a signal is given as
X(z)=1/(1- ⅓z-1).
If the system is unstable, then x[0] is
1/3
0
1
-1/3
Let x(t) be the input to a LTI system of impulse response h(t). If x(t) & h(t) are as shown in figure. then y(t) is
tu(t)-(t-1)u(t-1)+(t-2)u(t-2)-(t-3)u(t-3)
tu(t)-2(t-2)u(t-2)+(t-3)u(t-3)
tu(t)+(t-1)u(t-1)
tu(t)-(t-1)u(t-1)-(t-2)u(t-2)+(t-3)u(t-3)
The sequence 2n u[n] and (-2n u[-n-1])
are both casual sequences
have same Z- transform
have same ROC
Don't take values other than 0,1 &2
Find out the LT of the signal f(t) shown in figure.
1/s(1+e-s+e-2s)
1/s(1+e-s+e-2s-3e-3s)
1/s(1-e-s-e-2s+3e-3s)
None of the above
If L{f(t)}=F(s), then L{sinh at f(t)}=
F(s+a)+F(s-a)
½[F(s+a)-F(s-a)]
F(s+a)-F(s-a)
½[F(s-a)-F(s+a)]
Is X(t)= u(t) is a energy signal or power signal?
energy signal
power signal
Consider two signals x(t) and h(t). is impulse If h(t) is impulse response of a LTI system and x(t) is input to the system, then y(t) is
None of the above
DFT is applied to
Infinite sequence
Finite discrete sequence
continuous infinite signals
continuous finite sequences
Calculate DFT of x (n) = {1, 0, 1, 0}.
x (k) = {2, 0, 2, 0}
x (k) = {1, 0, 1, 0}
x (k) = {2, 0, 1, 0}
none
Truncation or rounding of the data results in
degradation of system performance
increase system performance
grow power
none
Which of the following best defines Nyquist frequency?
The frequency of resonance for the filtering circuit
The second harmonic
The lower frequency limit of sampling
The highest frequency component of a given analog signal
What is the nyquist rate of the signal x(t)=3cos(50*pi*t)+10sin(300*pi*t)-cos(100*pi*t)?
50 Hz
100 Hz
200 Hz
300 Hz
A system is said to be unstable if
None of the poles of its transfer function is shifted to the right half of s-plane
At least one zero of its transfer function is shifted to the right half of s-plane
At least one pole of its transfer function is shifted to the right half of s-plane
At least one pole of its transfer function is shifted to the left half of s-plane
In Gibb's phenomenon, the ringing effect is predominantly present near the ______ .
bandgap
bandedge
bandwidth
bandshell
