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Home Electronics and Communication Engineering Power Electronics See What Others Are Saying!
  • Question
  • A string of series connected thyristors needs equalising circuit to


  • Options
  • A. ensure proper firing
  • B. ensure proper current division
  • C. ensure proper voltage division
  • D. none of the above

  • Correct Answer
  • ensure proper voltage division 


  • More questions

    • 1. Assertion (A): Chopper always requires forced commutation

      Reason (R): Morgan chopper uses a saturable reactor.


    • Options
    • A. Both A and R are correct and R is correct explanation of A
    • B. Both A and R correct but R is not correct explanation of A
    • C. A is correct but R is wrong
    • D. A is wrong but R is correct
    • Discuss
    • 2. Assertion (A): In the interaction region of magnetron an electron is subjected to three forces: force due to electric field, force due to magnetic field and centrifugal force.

      Reason (R): The mechanism of generation of microwaves, in a magnetron, involves interaction of electromagnetic fields with electrons moving in static electric and magnetic fields oriented at right angles to each other.


    • Options
    • A. Both A and R are correct and R is correct explanation of A
    • B. Both A and R are correct but R is not correct explanation of A
    • C. A is correct but R is wrong
    • D. A is wrong but R is correct
    • Discuss
    • 3. Match the following:

      List I List II
      A. Resistance 1. M-1L-2T2I2
      B. Inductance 2. ML2T-2I-2
      C. Capacitance 3. M-1L-2T4I2
      D. Reluctance 4. ML2T-3I-2


    • Options
    • A. A-1, B-2, C-3, D-4
    • B. A-2, B-1, C-3, D-4
    • C. A-4, B-2, C-3, D-1
    • D. A-2, B-4, C-3, D-1
    • Discuss
    • 4. Match the following:

      List I (Set operation) List II (Set operator)
      A. Set equality 1. -
      B. Set inclusion 2. =
      C. Set intersection 3. < =
      D. Set difference 4. ?


    • Options
    • A. A-2, B-3, C-4, D-1
    • B. A-3, B-2, C-4, D-1
    • C. A-1, B-2, C-3, D-4
    • D. A-4, B-2, C-3, D-1
    • Discuss
    • 5. Assertion (A): A GTO circuit is more compact than SCR circuit

      Reason (R): A GTO can be turned off by negative gate pulse.


    • Options
    • A. Both A and R are correct and R is correct explanation of A
    • B. Both A and R correct but R is not correct explanation of A
    • C. A is correct but R is wrong
    • D. A is wrong but R is correct
    • Discuss
    • 6. Assertion (A): For high frequency lines inductive reactance is very high as compared to ac resistance.

      Reason (R): Due to skin effect ac resistance of line is higher than dc resistance.


    • Options
    • A. Both A and R are correct and R is correct explanation of A
    • B. Both A and R are correct but R is not correct explanation of A
    • C. A is correct but R is wrong
    • D. A is wrong but R is correct
    • Discuss
    • 7. Match the following:

      List I (Network parameter) List II (Measured under open-circuit conditions)
      A. Z11 1.
      B. A 2.
      C. C 3.
      D. Z22 4.


    • Options
    • A. A-1, B-4, C-2, D-3
    • B. A-3, B-4, C-2, D-1
    • C. A-1, B-2, C-4, D-3
    • D. A-3, B-2, C-4, D-1
    • Discuss
    • 8. Match the following:

      List I List II
      A. 1. Zero
      B. 2. 0.2
      C. 3. Actuator
      D. 4. infinity


    • Options
    • A. A-1, B-2, C-3, D-4
    • B. A-1, B-3, C-2, D-4
    • C. A-4, B-3, C-2, D-1
    • D. A-4, B-2, C-3, D-1
    • Discuss
    • 9. Match the following:

      List I f(t) List II F (s)
      A. cos ?t 1.
      B. sin ?t 2.
      C. cosh ?t 3.
      D. sinh ?t 4.


    • Options
    • A. A-1, B-3, C-2, D-4
    • B. A-4, B-2, C-1, D-3
    • C. A-4, B-3, C-1, D-2
    • D. A-3, B-2, C-1, D-4
    • Discuss
    • 10. Assertion (A): Power loss in a conductor of resistance P = I2R.

      Reason (R): When a conductor is carrying current with current density J as a result of applied field E, then heat developed/m3/ second = JE.


    • Options
    • A. Both A and R are true and R is correct explanation of A
    • B. Both A and R are true but R is not correct explanation of A
    • C. A is true but R is false
    • D. A is false but R is true
    • Discuss


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