• ( 1 ) Two rectangular waveforms of duration t1 and t2 seconds are convolved. What is the shape of the resulting waveform?

    • 1) Triangular
    • 2) Trapezoidal
    • 3) Rectangular
    • 4) Semi-circular
    • Discussion in forum
      Answer : 2) Trapezoidal
      Solution : If two rectangular waveforms of duration t1 and t2 seconds are convolved. then the shape of the resulting waveform is Trapezoidal.








      discussion


      Answer : 2) Trapezoidal

    • ( 2 ) FIR digital filter having __________ stability than FIR filter.

    • 1) good stability
    • 2) poor stability
    • 3) stability not guarnteed
    • 4) poor stability
    • Discussion in forum
      Answer : 1) good stability
      Solution : FIR digital filter having good stability stability than FIR filter.








      discussion


      Answer : 1) good stability

    • ( 3 ) 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
    • Discussion in forum
      Answer : 1) ensemble Average equal to time Average
      Solution : For Ergodic Process ensemble Average equal to time Average








      discussion


      Answer : 1) ensemble Average equal to time Average

    • ( 4 ) 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
    • Discussion in forum
      Answer : 4) Sx(ω) is non-positive function of ωSx(ω) ≤ 0 for all ω
      Solution : Properties of power spectral density function Sx(ω):
      Sx(ω) is real function of ω
      Sx(ω) is a even function of ω
      Sx(ω) is a odd function of ω








      discussion


      Answer : 4) Sx(ω) is non-positive function of ωSx(ω) ≤ 0 for all ω

    • ( 5 ) 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
    • Discussion in forum
      Answer : 3) the wave does not contain even harmonics
      Solution : In a complex wave, the negative half of the wave is a reproduction of the positive half wave. Then the wave does not contain even harmonics








      discussion


      Answer : 3) the wave does not contain even harmonics

    • ( 6 ) 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
    • Discussion in forum
      Answer : 4) a ramp of slope k
      Solution : The integral of k u(t) is a ramp of slope k








      discussion


      Answer : 4) a ramp of slope k

    • ( 7 ) 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
    • Discussion in forum
      Answer : 4) casual, Linear, time varying
      Solution : The discrete time system describes by y(n) = x(n2) is casual, Linear and time varying








      discussion


      Answer : 4) casual, Linear, time varying

    • ( 8 ) The inverse Laplace transform of 1/(s - a)2 is

    • 1) eat
    • 2) t eat
    • 3) t2 eat
    • 4) eat/t
    • Discussion in forum
      Answer : 2) t eat
      Solution : The inverse Laplace transform of 1/(s - a)2 is t eat








      discussion


      Answer : 2) t eat

    • ( 9 ) 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
    • Discussion in forum
      Answer : 3) complex conjugate
      Solution : For a second order system, damping ratio ζ is such that 0 < ζ <. Then the roots of characteristic equation are complex conjugate








      discussion


      Answer : 3) complex conjugate

    • ( 10 ) 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
    • Discussion in forum
      Answer : 4) all voltage sources and maximum number of capacitors
      Solution : The tree selected for the formation of state equations contains all voltage sources and maximum number of capacitors








      discussion


      Answer : 4) all voltage sources and maximum number of capacitors





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