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ECE :: Network Analysis and Synthesis

  1. When analysing two port networks in cascade, it is more convenient to use

  2. A.
    z parameters
    B.
    h parameters
    C.
    T parameters
    D.
    y parameters

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  3. For a transfer function H(s) = P(s)/Q(s), where P(s) and Q(s) are polynomials in s

  4. A.
    the degrees of P(s) is always greater than degree of Q(s)
    B.
    the degree of P(s) and Q(s) are equal
    C.
    the degree of P(s) is independent of degree of Q(s)
    D.
    the maximum difference in degrees of P(s) and Q(s) is 1

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  5. The inductance of a coil can be increased by

  6. A.
    choosing core material having high relative permeability
    B.
    decreasing diameter of the former
    C.
    decreasing the number of turns
    D.
    increasing core length

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  7. The dual of quantity charge is

  8. A.
    current
    B.
    Voltage
    C.
    flux
    D.
    dΦ/dt

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  9. Consider the following statement : If a network has an impedance of (1 - j) as a specific frequency, the circuit would consist of series

    1. R and C
    2. R and L
    3. R, L and C
    Which of the statement are correct?

  10. A.
    1 and 2
    B.
    1 and 3
    C.
    1, 2 and 3
    D.
    2 and 3

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  11. The minimum permissible size of aluminium cable for lighting circuit is

  12. A.
    1.2 sq. mm
    B.
    1.5 sq. mm
    C.
    2.2 sq. mm
    D.
    3.5 sq. mm

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  13. Assertion (A): In a parallel circuit having two branches, each branch current may be more than source current.

    Reason (R): Calculations in ac circuits use rules of complex algebra.

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

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  15. Which one of the following parameters does not exist for the two port network shown in the given figure?

  16. A.
    ABCD
    B.
    y
    C.
    h
    D.
    z

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  17. Current density J, conductivity σ and electric field E in a conductor are related as

  18. A.
    J = σE
    B.
    σ = JE
    C.
    D.
    J = σE2

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  19. If a driving point function N(s) = p(s)/q(s), then

  20. A.
    the degree of p(s) and q(s) may differ by one only
    B.
    the degree of p(s) and q(s) may differ by zero only
    C.
    the degrees of p(s) and q(s) be equal
    D.
    the degrees of p(s) and q(s) must not be equal

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