electronics-and-communication-engineering-signals-and-systems Related Question Answers

1. Provide meaningful words to fill the blanks: There were ......... telephone booths around, so the old one was closed.?





2. A voltage V(t) is a Gaussian ergodic random process with a mean of zero and a variance of 4 volt2. If it is measured by a dc meter. The reading will be




3. A first order system will never be able to give a __________ response band stopband passall pass Choose the correct option





4. In the given figure the ratio T/d is the duty factor.



5. If £[f(t)] = F(s), then £[f(t - T)] =



6. The z-transform of a particular signal is given where The system after implementation will be





7. The system with given pole-zero diagram is





8. A pole zero pattern of a certain filter is shown in figure. This filter must be





9. If transfer function of a system is H(z) = 6 + z-1 + z-2 then system is





10. The period of the function cos is



11. Let x(t) and y(t) with F.T. x(f) and y(f) respectively be related as shown in figure Then y(f) is



12. Which one is a linear system?





13. Laplace transform of a pulse function of magnitude E and duration from t = 0 to t = a is


14. The continuous time system with impulse response h(t) = is stable, for n is even, when





15. If I (s) , initial value of i(t) is





16. If then for this to be true x(t) is




17. For the discrete time system of the given figure





18. The analog signal m(t) is given below m(t) = 4 cos 100 p t + 8 sin 200 p t + cos 300 p t, the Nyquist sampling rate will be





19. The ROC of sequence in the Z.T. of sequence x[n] = an ∪ [n] is





20. In Laplace transform, multiplication by e-at in time domain becomes





21. When was the first Asiad held?





22. What is a junk e-mail?





23. Inverse Fourier transform of sgn (ω) is



24. If I (s) , the final value of i(t) is





25. A signal m(t) is multiplied by a sinusoidal waveform of frequency fc such that v(t)=m(t) cos 2p fct If Fourier transform of m(t) is M(f), Fourier transform of v(t) will be





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