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ECE :: Signals and Systems

Signals and Systems - Section 1
Signals and Systems - Section 2
Signals and Systems - Section 3
Signals and Systems - Section 4
Signals and Systems - Section 5
Signals and Systems - Section 6
Signals and Systems - Section 7
Signals and Systems - Section 8
Signals and Systems - Section 9
Signals and Systems - Section 10
Signals and Systems - Section-11

  1. Fourier transform of sgn (t) is

    2. A.
    B.
    C.
    U(t)
    D.
    2δ(ω)

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  2. If the number of ways an event may result ins analysed into m successes and n failures, each equally likely to occur, the probability of success in a single trial is m( m + n)

    3. A.
    True
    B.
    False

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  3. If n is the number of observations and r is the residue, the standard deviation σ =

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  4. Which one is correct option about ROC?

    5. A.
    ROC does not contain any pole
    B.
    ROC of finite duration sequence is entire plane expect z = 0, z = ∞
    C.
    a and b
    D.
    only a

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  5. Assertion (A): The scalling theroem in Laplace transform relates the scale changes in s domain to the consequent changes in t domain.

    Reason (R): If

    6. A.
    Both A and R are correct and R is correct explanation of A
    B.
    Both A and R are correct but R is not correct explanation of A
    C.
    A is true, R is false
    D.
    A is false, R is true

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  6. The integral of a unit impulse is unit step function.

    7. A.
    True
    B.
    False

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  7. If X(z) = (1 - az-1)-1 and |a| < |z|, the initial value x0 = 0

    8. A.
    True
    B.
    False

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  8. Assertion (A): The exponential form of Fourierseries is

    Reason (R): If f(t) is an even function, the coefficients Fn are real.

    9. A.
    Both A and R are correct and R is correct explanation of A
    B.
    Both A and R are correct but R is not correct explanation of A
    C.
    A is true, R is false
    D.
    A is false, R is true

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  9. The z transform of fk = ak is

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  10. In the given figure f(t) is an even function.

    11. A.
    True
    B.
    False

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