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ECA - Assignment - III (11-02-2021)

Quiz by NAGA RAJU ELURI

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20 questions
Show answers
  • Q1
    Inverse Laplace transform of F(s) = (5s+1)/(s2-25) is
    cos5t+1/5sin5t
    5cosh5t+1/5sinh5t
    5cos5t+1/5sin5t
    5cosh5t+sinh5t
    60s
  • Q2
    Laplace transform of function f(t) = eatsin(wt) is
    w/((s-a)2+w2)
    s/((s-a)2+w2)
    (s-a)/((s-a)2+w)
    (s-a)/(s-a)+w
    60s
  • Q3
    Laplace transform of an impulse response is regarded as _____function of the system
    Transfer
    Hypothetical
    Parabolic
    Analytic
    60s
  • Q4
    By equating the denominator of transfer function to zero, which among the following will be obtained?
    Both a and b
    Poles
    None of the above
    Zeros
    60s
  • Q5
    The transfer function of a system is defined as the ratio of its output to input in
    Fourier transform
    Both (a) and (b)
    Laplace transform
    Z-transform
    60s
  • Q6
    Mutually inductance between two magnetically coupled coils depends on
    permeability of core
    cross sectional area of their common core
    All of above
    the number of their turns
    60s
  • Q7
    What is the Value of Leq=?
    Question Image
    2 H
    4H
    8H
    6H
    60s
  • Q8
    The direction of induced emf can be found by
    Lenz's law
    Laplace's law
    Voltage law
    Fleming's right hand rule
    60s
  • Q9
    Refer to the two magnetically coupled coils of Fig.(a). The polarity of the mutual voltage is
    Question Image
    a and b
    a or b
    Negative
    Positive
    60s
  • Q10
    The coefficient of coupling for two coils having L1 = 2 H, L2 = 8 H, M = 3 H is
    .0.75
    5.333
    0.1875
    1.333
    60s
  • Q11
    Mutual inductance between two coupled coils depend on?
    Rate of change of current
    Amount of flux linkage
    Rate of change of flux linkage
    Flux density
    60s
  • Q12
    What is the coupling coefficient when all the flux of coil 1 links with coil 2?
    1
    0
    100
    Insufficient information provided
    60s
  • Q13
    The working principle of transformer depends on
    Faraday's law of electromagnetic induction
    Ampere's law.
    Coulomb's law.
    Newton's law.
    60s
  • Q14
    Two coupled coils with L1=L2=0.6 H have a coupling coefficient of K = 0.8. The turns ratio N1/N2 is
    2
    4
    1
    0.5
    60s
  • Q15
    Number of possible combination generated by four variables taken two at a time in a two-port network is
    5
    6
    2
    4
    60s

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