Increased pulse-width in the flat-top sampling , leads to ________

Electronics and Communication Engineering (ECE) : Signals and Systems - Quiz(MCQ)

No harmful effects in reproduction

Greater aliasing errors in reproduction

Attenuation of low frequencies in reproduction

Attenuation of high frequencies in reproduction

Correct Answer : Option (D) : Attenuation of high frequencies in reproduction

Explanation : As pulse width T is increased, the width 1/T of the first lobe of the spectrum is decreased.
Hence, increased pulse-width in the flat-top sampling, leads to attenuation of high frequencies in reproduction.

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For a Gaussian process, auto-correlation sequence also implies that

ergodic process

statistical dependence

statistical independence

All of the above

Correct Answer : statistical dependence

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1. If ensemble and time averages of a random process are identical, the process is ergodic.
2. If ensemble and time average of a random process are not identical, the process is ergodic.
3. An ergodic process is stationary.
4. A stationary process is necessarily ergodic.

Which of the above statements are correct?

1 only

1 and 3 only

1 and 4 only

1, 3 and 4 only

Correct Answer : 1 and 3 only

In RLC circuits the state variables generally selected are

voltages across capacitors

currents through resistances and capacitances

currents through inductances and voltages across capacitances

currents through resistances and voltages across capacitors

Correct Answer : currents through inductances and voltages across capacitances