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  1. What are step-up choppers
  2. What is Darlington configuration
  3. In general how IGBT's are classified
  4. What is power MOSFET
  5. What is co-converter
  6. What is schottky diode
  7. What is Derating of SCR's
  8. Explain AC Regulator
  9. What are choppers
  10. What is a DIAC
  11. What is reverse-conducting
  12. What is GTO
  13. What is a diode
  14. How BJT is tested
  15. What are buck converters
  16. What is holding current and latching
  17. Explain principle of chopper
  18. What are the harmonic mitigating
  19. What is one -quadrant choppers
  20. How a power diode is tested
  21. How IGBT is different from
  22. What is converter-grade
  23. How the turnoff is achieved
  24. What is a triac
  25. What are the current-driver
  26. What is maximum surge current
  27. What are the types of transistors
  28. What are boost converters
  29. What is pedestal and ramp
  30. Explain the various chopper
  31. What are the two major problems during
  32. What is dynamic avalanche in
  33. Why silicon controlled switch has
  34. How schottky diodes are
  35. How is IGBT turned ON and
  36. Define RBSOA and FBSOA
  37. How the thyristor is turned
  38. What are step-down choppers
  39. What is string efficiency of SCR's connected
  40. What are the important diode voltage
  41. What is break down voltage in
  42. Why NPT (non punch through) IGBT's can
  43. What is insulated-gate bipolar
  44. Where does Inverter-grade thyristor
  45. What is inverter grade thyristor
  46. How many terminals are there and
  47. What is MOS-controlled thyristor
  48. What is two -quadrant choppers
  49. What is meant by di/dt rating of
  50. Why SCR's are connected in series and
  51. What is silicon controlled
  52. What is four -quadrant
  53. What is the use of free wheeling
  54. What are the types of single phase
  55. What are the differences between controlled
  56. What are the advantages of schottky
  57. What is asymmetrical silicon controlled
  58. How many layers and junctions are there
  59. What are the elements against which power
  60. How many layers are there in a transistor
  61. Why diode rectifiers generate
  62. What is the use of pulse transformer in
  63. What are the different types of commutations
  64. What are the primary methods in common use
  65. What are the two types of control strategies
  66. What are the functions of switch mode
  67. Define peak inverse voltage of
  68. What is the advantage of MCT
  69. How is power transistor turned
  70. Why thyristor is also called
  71. Basically how many classifications of thyristors
  72. Why PT (punch through) IGBT's cannot be
  73. What are the six different methods of commutation
  74. What is the difference between mid-point
  75. What are the important diode current characteristics
  76. What are the power Bi-polar junction
  77. Why a RC series circuit is connected
  78. What are the voltage-driver
  79. Why there is no need for external commutation
  80. What is forward voltage drop in