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Power Electronics

Power Electronics
If the anode current is 800 A, then the amount of current required to turn off the GTO is about

 400 A.
 600 A.
  200 A.
 20 A.

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Power Electronics
A diac has ___________ terminals.

Two
None of these
Three
Four

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Power Electronics
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.

High
Extremely low
Low
None of these

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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.

  100 µs.
 300 µs.
 200 µs.
 150 µs.

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Power Electronics
What happen due to high di / dt?

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

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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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