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Power Electronics

Power Electronics
4 thyristors rated 200 V in series. The operating voltage of the string is 0.600 V. Derating factor of the string is

 0.2.
  0.25.
 0.75.
 0.7.

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Power Electronics
Which of the following is used in heat sink?

 Carbon.
 Silver.
 Iron.
  Aluminium.

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Power Electronics
COOLMOS device can be used in application up to power range of

 500 VA.
  2 KVA.
 1 KVA.
 100 KVA.

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Power Electronics
After proper turn on of thyristor

 gate signal is always present.
None of these
  gate signal must be removed.
 gate signal should present but can be removed.

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Power Electronics
The latching current of GTO should be of order

 2 A.
 1 A.
  500 mA.
 100 mA.

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Power Electronics
A modern power semiconductor device that combines the characteristic of BJT and MOSFET is

  IGBT.
 FCT.
 MCT.
 GTO.

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