Control Systems Spectrum Analysis Sampling Process Online Exam Quiz
Control Systems Spectrum Analysis Sampling Process GK Quiz. Question and Answers related to Control Systems Spectrum Analysis Sampling Process. MCQ (Multiple Choice Questions with answers about Control Systems Spectrum Analysis Sampling Process
A bandpass sampling extends from 4-6 kHz. What is the smallest sampling frequency required to retain all the information in the signal.
Options
A : 1 kHz
B : 2 kHz
C : 3 kHz
D : 4 kHz
A signal represented by x(t) =5cos 400?t is sampled at a rate 300 samples/sec. The resulting samples are passed through an ideal low pass filter of cut-off frequency 150 Hz. Which of the following will be contained in the output of the LPF?
Options
A : 100 Hz
B : 100 Hz, 150 Hz
C : 50 Hz, 100 Hz
D : 50 Hz, 100 Hz, 150 Hz
A band limited signal with a maximum frequency of 5 KHz to be sampled. According to the sampling theorem, the sampling frequency which is not valid is:
Options
A : 5 KHz
B : 12 KHz
C : 15 KHz
D : 20 KHz
Increased pulse-width in the flat-top sampling leads to:
Options
A : Attenuation of high frequencies in reproduction
B : Attenuation of low frequencies in reproduction
C : Greater aliasing errors in reproduction
D : No harmful effects in reproduction
Let x(t) be a continuous-time, real valued signal band-limited to F Hz. The Nyquist sampling rate in Hz, For y(t) =x(0.5t) +x(t)-x(2t) is
Options
A : F
B : 2F
C : 4F
D : 8F
A signal m(t) with bandwidth 500 Hz is first multiplied by a signal g(t). The resulting signal is passed through an ideal low pass filter with bandwidth 1 kHz. The output of the low pass filter would be :
Options
A : Impulse
B : m(t)
C : 0
D : m(t)del(t)
The sinusoid x(t) =6cos10?t is sampled at the rate of 15 Hz and applied to ideal rectangular LPF with cut-off frequency of 10 Hz, then the output of filter contains:
Options
A : Only 10? rad/sec component
B : 10? rad/sec component
C : 10? rad/sec and 20? rad/sec components
D : +10? rad/sec and +20? rad/sec components
An LTI system having transfer function s2+1/s2+2s+1 and input x(t) =sin(t+1) is in steady state. The output is sampled at ws rad/s to obtain the final output {y (k)}. Which of the following is true?
Options
A : Y is zero for all sampling frequencies ws
B : Y is non zero for all sampling frequencies ws
C : Y is non zero for ws>2 but zero for ws<2
D : Y is zero for ws>2 but non zero for ws<2
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