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POWER ELECTRONICS

Power Electronics
Which of following is normally ON device

 TRIAC.
 BJT.
 IGBT.
  SIT.

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Power Electronics
Power transistor are type of

 IGBTs.
 BJTs.
 MOSFETs.
  All of above.

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Power Electronics
A GTO can be turned on by applying

 None of these.
 Positive source signal.
  Positive gate signal.
 Positive drain signal.

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Power Electronics
SITH is also known as

 Filled controlled rectifier.
 None of these.
 Silicon controlled rectifier.
  Filled controlled diode.

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Power Electronics
The reverse recovery time of diode is trr = 3 μs and the rate off all of the diode current is di/dt = 30 A/μs. The storage charge current QRR is

 130 μs.
 140 μs.
  135 μs.
 145 μs.

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