SIGNAL SYSTEM MCQS SET 12

SIGNAL SYSTEM MCQS SET 12

1) The tree selected for the formation of state equations contains
1) all voltage sources
2) all capacitors
3) all inductors and current sources
4) all voltage sources and maximum number of capacitors
5) None of these
Answer:  4) all voltage sources and maximum number of capacitors
 

2) For a second order system, damping ratio ζ is such that 0 < ζ <. Then the roots of characteristic equation are
1) real but not equal
2) imaginary
3) complex conjugate
4) real and equal
5) None of these
Answer:  3) complex conjugate
 

3) The inverse Laplace transform of 1/(s - a)2 is
1) eat
2) t eat
3) t2 eat
4) eat/t
5) t/eat
Answer:  2) t eat
 

4) The discrete time system describes by y(n) = x(n2) is
1) non-casual, non-linear, time variant
2) non-casual, Linear, time invariant
3) casual, non-linear, timevari
4) casual, Linear, time varying
5) casual, Linear, time invariant
Answer:  4) casual, Linear, time varying
 

5) The integral of k u(t) is
1) 1/k δ(t)
2) k δ(t)
3) a ramp of slope 1/k
4) a ramp of slope k
5) None of these
Answer:  4) a ramp of slope k

6) In a complex wave, the negative half of the wave is a reproduction of the positive half
wave. Then
1) the wave does not contain triple harmonics
2) the wave does not contain odd harmonics

3) the wave does not contain even harmonics
4) the wave contains only fundamental and third harmonic
Answer:  3) the wave does not contain even harmonics
 

7) Which of the following is/are not a property/properties power spectral density function
Sx(ω)?
1) Sx(ω) is real function of ω
2) Sx(ω) is a even function of ω
3) Sx(ω) is a odd function of ω
4) Sx(ω) is non-positive function of ωSx(ω) ≤ 0 for all ω
5) All of the above
Answer:  4) Sx(ω) is non-positive function of ωSx(ω) ≤ 0 for all ω
 

8) For Ergodic Process
1) ensemble Average equal to time Average
2) ensemble Average is not equal to time Average
3) ensemble Average > Time Average
4) ensemble Average < Time Average
5) both 1 & 3
Answer:  1) ensemble Average equal to time Average
9) FIR digital filter having __________ stability than FIR filter.
1) good stability
2) poor stability
3) stability not guarnteed
4) poor stability
5) None of these
Answer:  1) good stability