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Power Electronics

Power Electronics
The latching current of SCR is 20 mA. Its holding current will be

 23 mA.
 60 mA.
 40 mA.
  10 mA.

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Power Electronics
Which statement is true for latching current ?

 Both C and D.
  It is related to turn on process of the device.
 It is related to conduction process of device.
 It is related to turn off process of the device.

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Power Electronics
A power MOSFET has three terminals called

 Collector, emitter and base.
 Drain, source and base.
 Collector, emitter and gate.
  Drain, source and gate.

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Power Electronics
IGBT combines the advantages of

 None of these.
  BJTs and MOSFETs.
 SITs and MOSFETs.
 BJTs and SITs.

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Power Electronics
A string of n parallel SCRs is operated at 72 KA, the rating of each SCR is 1 KA. If derating factor of the string is 0.1. Then calculate the value of n

  80.
 90.
 60.
 70.

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Power Electronics
During which time maximum conduction spreading take place in the thyristor during turn ON?

  Spread time.
 Rise time.
 Same for every case.
 Delay time.

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