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  • Question

  • The useful operational life of INSAT-IB (launched in 1983) is expected to end by


  • Options
  • A. 1992-93
  • B. 1991-92
  • C. 1989-90
  • D. 1993-94

  • Correct Answer
  • 1989-90 

    • More questions

    • 1. Computer virus can hide itself in a diskette but not in a hard disk.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Potentiometer method of dc voltage measurement is more accurate than direct measurement using a voltmeter because

    • Options
    • A. it loads the circuit to maximum extent
    • B. it loads the circuit moderately
    • C. it does not load the circuit at all
    • D. it uses centre zero galvanometer instead of Voltmeters
      • Discuss
    • 3. In the given figure the circuits for input impedance of a microwave device with output ports match terminated. The device is

    • Options
    • A. E plane tee
    • B. H plane tee
    • C. magic tee
    • D. hybrid ring
      • Discuss
    • 4. Match the following:

      List I List II
      A. Poles and zeros of lie an real axis driving point LC network 1. lie an real axis
      B. Canonic LC network has 2. a zero
      C. The number of Canonic networks for the given driving point function 3. minimum number of elements
      D. The first critical frequency nearest the origin for RL driving point impedance 4. four
      5. minimum number of elements
      6. alternate
      7. either a pole or zero
      8. three


    • Options
    • A. A-1, B-5, C-8, D-7
    • B. A-6, B-5, C-3, D-2
    • C. A-1, B-5, C-4, D-2
    • D. A-1, B-3, C-4, D-7
      • Discuss
    • 5. A line slightly longer than length and short circuited at far end behaves as

    • Options
    • A. an inductance
    • B. a capacitance
    • C. L and C in series
    • D. L and C in parallel
      • Discuss
    • 6. For a 12 pulse operation, the two 6 pulse units are fed by

    • Options
    • A. Y - Y and Y - Y transformers
    • B. ? - ? and ? - ? transformers
    • C. Y - Y and Y - ? transformers
    • D. Y - ? and Y - ? transformers
      • Discuss
    • 7. Match the following:

      List I (Network Theorems) List II (Most distinguished property of networks)
      A. Reciprocity 1. Impedance Matching
      B. Tellegen's 2. Bilateral
      C. Superposition 3. vk(t1)ik(t2) = 0
      D. Maximum power transfer 4. Linear
      5. Non-linear


    • Options
    • A. A-1, B-2, C-3, D-4
    • B. A-1, B-2, C-3, D-5
    • C. A-2, B-3, C-4, D-1
    • D. A-2, B-3, C-5, D-1
      • Discuss
    • 8. In the given figure the input frequency is such that R << Xc, then

    • Options
    • A. v0 lags vi by 90°
    • B. v0 leads vi by 90°
    • C. v0 and vi are in phase
    • D. either (b) or (c)
      • Discuss
    • 9. The selectivity of a radio receiver is

    • Options
    • A. its ability to reject adjacent unwanted signals
    • B. its ability to amplify weak signals
    • C. the frequency at which it gives maximum amplification to signal.
    • D. its ability to suppress noise.
      • Discuss
    • 10. The IF stage of a receiver employs

    • Options
    • A. capacitive coupling
    • B. impedance coupling
    • C. double-tuned transformer coupling
    • D. single-tuned transformer coupling
      • Discuss

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