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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. The coefficients Fn in the exponential form of Fourier series are

    2. A.
    independent of frequency
    B.
    functions of frequency
    C.
    even function of frequency
    D.
    odd functions of frequency

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  2. If f1(t) ↔ F1 (jω) and f2(t) ↔ F2(jω), then f1(t)↔ f2(t)

    3. A.
    F1(jω) F2(jω)
    B.
    F1(jω)*F2(jω)
    C.
    D.
    none of these

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  3. L [f(t - a)] = F(jω) e-jωa

    4. A.
    True
    B.
    False

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  4. The integral of k δ(t) is

    5. A.
    a step function of magnitude k
    B.
    a step function 'of magnitude 1/k
    C.
    a ramp of slope k
    D.
    a ramp of slope 1/k

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  5. The integral of unit step function is a ramp of slope unity.

    6. A.
    True
    B.
    False

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  6. Which one of the systems described by the following I/P - O/P relations is time invariant

    7. A.
    y(n) = n x(n)
    B.
    y(n) = x(n) - x(n - 1)
    C.
    y(n) = x(- n)
    D.
    y(n) = x(n) cos 2pf0n

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  7. A wave f(t) has half wave symmetry and time period equal to T. Then

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  8. The Nyquist sampling interval, for the signal sinc (700t) + sinc (500t) is

    9. A.
    1/350 sec
    B.
    p/350 sec
    C.
    1/700 sec
    D.

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  9. The integral of a unit impulse is

    10. A.
    a unit step function
    B.
    a ramp function of slope 1
    C.
    a pulse function of magnitude 1
    D.
    none of the above

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  10. State variable formulation is very suitable for computer solution.

    11. A.
    True
    B.
    False

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