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  • Question

  • In a 3 phase full wave regulator feeding a star connected resistance load the input voltage is 400 V line to line. The firing angle is 160°. The line to line output voltage would be


  • Options
  • A. 400 V
  • B. about 100 V
  • C. about 20 V
  • D. zero

  • Correct Answer
  • zero 

    Explanation
    In a three-phase full wave regulator, output voltage is zero if a ? 150°.

    More questions

    • 1. In an integral controller

    • Options
    • A. the output is proportional to input
    • B. the rate of change of output is proportional to input
    • C. the output is proportional to rate of change of input
    • D. none of the above
      • Discuss
    • 2. Wave A = 100 sin ?t and wave B = 100 cos ?t. Then

    • Options
    • A. rms values of the two waves are equal
    • B. rms values of A is more than that of B
    • C. rms values of A is less than that of B
    • D. rms values of the two waves may or may not be equal
      • Discuss
    • 3. India's first domestic geostationary satellite 1NSAT-IA was launched on 10th April 1982 from

    • Options
    • A. USSR
    • B. USA
    • C. UK
    • D. UP
      • Discuss
    • 4. For the system of the given figure the transfer function is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. Inverse Fourier transform of sgn (?) is

    • Options
    • A.
    • B. 1
    • C. U(t)
    • D.
      • Discuss
    • 6. The terminals of a power MOSFET are called

    • Options
    • A. emitter, base, collector
    • B. source, gate, drain
    • C. source, base, drain
    • D. emitter, gate, drain
      • Discuss
    • 7. A JK flip flop has tpd= 12 ns. The largest modulus of a ripple counter using these flip flops and operating at 10 MHz is

    • Options
    • A. 16
    • B. 64
    • C. 128
    • D. 256
      • Discuss
    • 8. In a two phase ac servomotor rotor resistance is R and rotor reactance is X. The speed curve will be linear if

    • Options
    • A.
    • B.
    • C.
    • D. X2 = R
      • Discuss
    • 9. A uniform plane wave is one in which

    • Options
    • A. x = 0
    • B. .
    • C. and are perpendicular
    • D. and lie in a plane
      • Discuss
    • 10. Regarding TASI which one of the following statements is wrong?

    • Options
    • A. It snatches the channel in his speech and may allocate it to another speaker needing it.
    • B. The same speaker is reassigned a channel almost instantly when he speaks again even when the circuit is heavily loaded.
    • C. It increases the overall utilization of the transmission channel
    • D. Intercontinental callers sometimes confuse the effects of TASI with the effects of satellite delay.
      • Discuss

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