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Power Electronics

Power Electronics
Which of following is not a power transistor?

 IGBTs.
  TRIAC.
 COOLMOS.
 SITS.

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Power Electronics
What happen due to high di / dt?

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

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Power Electronics
IGBT combines the advantages of

  BJTs and MOSFETs.
 BJTs and SITs.
 None of these.
 SITs and MOSFETs.

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Power Electronics
The V-I characteristics for a triac in the first and third quadrants are essentially identical to those of ___________ in its first quadrant

Transistor
None of these
SCR
UJT

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

 SITH.
 SCR.
 SIT.
  GTO.

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Power Electronics
Latching current for an SCR inserted between a dc voltage source of 200 V and load is 100 mA. Compute the minimum rate of width pulse required to turn ON the SCR in case load consists of R = 20 Ω in series with L = 0.2 H.

 300 µs.
  100 µs.
 150 µs.
 200 µs.

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