Home / GATE 2017-2018 / GATE Instrumentation :: Practice Test Paper 1

GATE 2017-2018 :: GATE Instrumentation

  1. If x = √-1, then the value of xx is
  2. A.
    e-Ï€/2
    B.
    eπ/2
    C.
    x
    D.
    1

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  3. With initial condition x(1)  0.5 , the solution of the differential equation, t dx/dt + x = t is
  4. A.
    x = t - 1/2
    B.
    x = t2 - 1/2
    C.
    x = t2/2
    D.
    x = t/2

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  5. Two independent random variables X and Y are uniformly distributed in the interval [“1, 1]. The probability that max[X, Y] is less than 1/2 is
  6. A.
    3/4
    B.
    9/16
    C.
    1/4
    D.
    2/3

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  7. The unilateral Laplace transform of f (t) is 1/(s2 + s + 1). The unilateral Laplace transform of t f (t) is
  8. A.
    - s/(s2 + s + 1)2
    B.
    - (2s + 1)/(s2 + s + 1)2
    C.
    s/(s2 + s + 1)2
    D.
    (2s + 1)/(s2 + s + 1)2

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  9. Given f(z) = 1(z + 1) - 2/(z + 3). If C is a counterclockwise path in the z-plane such that |z + 1|, the value of  is
  10. A.
    -2
    B.
    -1
    C.
    1
    D.
    2

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  11. The average power delivered to an impedance (4 - j3)Ω by a current 5cos(100 πt + 100) A is
  12. A.
    44.2 W
    B.
    50 W
    C.
    62.5 W
    D.
    125 W

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  13. In the circuit shown below, the current through the inductor is

  14. A.
    2/(1 + j) A
    B.
    -1/(1 + j) A
    C.
    1/(1 + j) A
    D.
    0 A

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  15. In the following figure, C1 and C2 are ideal capacitors. C1 has been charged to 12 V before the ideal switch S is closed at t = 0. The current i(t) for all t is

  16. A.
    zero
    B.
    a step function
    C.
    an exponentially decaying function
    D.
    an impulse function

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  17. The impedance looking into nodes 1 and 2 in the given circuit is

  18. A.
    50 Ω
    B.
    100 Ω
    C.
    5 kΩ
    D.
    10.1 kΩ

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  19. The i-v characteristics of the diode in the circuit given below are

    The current in the circuit is
  20. A.
    10 mA
    B.
    9.3 mA
    C.
    6.67 mA
    D.
    6.2 mA

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