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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

 0.75.
 0.7.
 0.2.
  0.25.

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Power Electronics
Figure shows two thyristors rated 400 A sharing a load current. Current through T2 is 180A. Current through T1 will be

  150 A.
 100 A.
 110 A.
 120 A.

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Power Electronics
Switching frequency of SITH is

  100 KHz.
 5 KHz.
 60 KHz.
 10 KHz.

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Power Electronics
Power transistor are type of

 BJTs.
 MOSFETs.
 IGBTs.
  All of above.

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Power Electronics
Which of following devices has highest di/dt and dv/dt capability?

 SIT.
  GTO.
 SITH.
 SCR.

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Power Electronics
When the temperature increases, the intrinsic stand off ratio ___________.

Essentially remains the same
None of these
Increases
Decreases

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