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Power Electronics

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

 100 A.
  150 A.
 120 A.
 110 A.

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Power Electronics
A thyristor can termed as

 Square wave switch.
  DC switch.
 AC switch.
 Both a and B.

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Power Electronics
The typical time of rising time lies between

 10 - 20 µs.
  1 - 4 µs.
 90 - 100 µs.
 40 - 60 µs.

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Power Electronics
Which of the following is disadvantage of fast recovery diodes?

  Doping is carried out.
 Recovery is only 50 µs.
 Recovery is only 5 µs.
 None of these.

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

 MCT.
  IGBT.
 FCT.
 GTO.

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Power Electronics
Which of the following is used in SCR to protect from high dV / dt?

 Fuse.
 Circuit breaker.
 Equalizing circuit.
  Snubber circuit.

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