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  • Question

  • A stepper motor is


  • Options
  • A. a two phase induction motor
  • B. is a kind of rotating amplifier
  • C. is an electromagnetic transducer used to convert an angular position of shaft into electrical signal
  • D. is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis

  • Correct Answer
  • is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis 

    Explanation
    When input pulses are applied, the motor moves in steps.

    More questions

    • 1. Match the following:

      List I (VCR system) List II (Azimuth angle)
      A. VHS 1. 7°
      B. Video 2000 2. 15°
      C. Betamax 3. 6°


    • Options
    • A. A-1, B-2, C-3
    • B. A-1, B-3, C-2
    • C. A-3, B-1, C-2
    • D. A-3, B-2, C-1
      • Discuss
    • 2. Match the following:

      List I List II
      A. Copper 1. produces discrete energy level just above valence band
      B. Rubber 2. produces discrete energy level just below conduction band
      C. Antimony 3. large forbidden gap
      D. Boron 4. valence and conduction bands overlap


    • Options
    • A. A-1, B-2, C-4, D-3
    • B. A-4, B-1, C-2, D-3
    • C. A-4, B-3, C-1, D-2
    • D. A-2, B-1, C-3, D-4
      • Discuss
    • 3. The number of doped regions in a SCR is

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. 5
      • Discuss
    • 4. In a half bridge inverter the gate pulses of the two thyristors have a phase displacement of

    • Options
    • A. 60°
    • B. 90°
    • C. 120°
    • D. 180°
      • Discuss
    • 5. A loss less line of characteristic impedance Z0 is terminated in pure reactance of -jZ0 value. VSWR is

    • Options
    • A. 10
    • B. 2
    • C. 1
    • D. infinity
      • Discuss
    • 6. A typical error rate on satellite circuits is one bit error in

    • Options
    • A. 107
    • B. 103
    • C. 102
    • D. 1010
      • Discuss
    • 7. In elemental dielectrics, the orientation and ionic polarization are absent.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. Which of the following should be used in order to prevent overloading or the last IF amplifier in a receiver?

    • Options
    • A. Variable selectivity
    • B. Variable sensitivity
    • C. Double conversion
    • D. Squelch
      • Discuss
    • 9. The waveshape of output voltage of half bridge inverter is

    • Options
    • A. sinusoidal
    • B. square
    • C. triangular
    • D. either (a) or (b)
      • Discuss
    • 10. The main utility of SCR is due to

    • Options
    • A. gate triggering
    • B. high temperature triggering
    • C. triggering
    • D. high breakdown voltage
      • Discuss

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