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  1. In the given figure shows the pole “ zero plot , The Transfer function F(s) is

  2. A.
    (s-a1)(s-a2) (s-a3)
    B.
    (s+a1)(s+a2) (s+a3)
    C.
    s2/(s+a1)(s+a2) (s+a3)
    D.
    1/(s-a1)(s-a2) (s-a3)

  3. For the first order system having Transfer system 1/(1-sT),the unit impulse response is
  4. A.
    e "“t/T
    B.
    T e "“t/T
    C.
    (1/T) * e t/T
    D.
    T2 e "“t/T

  5. Signal flow graph is used to find _________
  6. A.
    Stability of the system
    B.
    Controllability of the system
    C.
    Transfer function of the system
    D.
    Poles of the system

  7. As compared to a Closed loop system an Open loop system is
  8. A.
    More stable as well as more accurate
    B.
    Less stable as well as less accurate
    C.
    More stable but less accurate
    D.
    Less stable but more accurate

  9. Phase margin of a system is used to specify
  10. A.
    Relative stability
    B.
    Absolute Stability
    C.
    Time Response
    D.
    Frequency response

  11. Gain cross - over frequency is defined as
  12. A.
    |G(jω)H(jω)|=1
    B.
    |G(jω)H(jω)|=0
    C.
    |G(jω)H(jω)|=∞
    D.
    |G(jω)H(jω)|=1/2

  13. Which one of the following is an example of open “ loop system
  14. A.
    A windscreen wiper
    B.
    Respiratory system of an animal
    C.
    A system for controlling anti-rocket missiles
    D.
    None of these

  15. The principles of Homogeneity & Superposition are applied to
  16. A.
    Linear Time Variant Systems
    B.
    Non - Linear Time Variant Systems
    C.
    Linear Time Invariant Systems
    D.
    Non - Linear Time Invariant Systems

  17. What is the Voltage gain of the following arrangement

  18. A.
    (1+AB)/B
    B.
    B/ (1+AB)
    C.
    (1+AB)/A
    D.
    A/ (1+AB)

  19. The Transfer function C/R of the block diagram given below is

  20. A.
    G1+(G2/(1+G2H1+H2))
    B.
    G1 G2/(1+G1 H2 H1 H2)
    C.
    G1 G2/( G2H1+ G1 G2 H2+1)
    D.
    G1 G2/(1+G2 H1+ G1 H2)