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Power Electronics

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

  GTO.
 SITH.
 SCR.
 SIT.

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Power Electronics
A step up chopper has input voltage 110 V and output voltage 150 V. The value of duty cycle is

  0.45.
  0.27.
  0.32.
  0.67.

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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

 120 A.
 100 A.
  150 A.
 110 A.

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Power Electronics
The triac is ___________.

None of these
Not a thyristor
Like a bidirectional SCR
A four-terminal device

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Power Electronics
What happen due to high di / dt?

  Local hot spot.
 Insulation failure.
 Breakdown of junction.
 None of these.

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Power Electronics
A single phase full bridge inverter can operate in load commutation mode in case load consists of

  RLC underdamped.
 RLC overdamped.
 RL.
 RLC critically damped.

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