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Power Electronics

Power Electronics
A diac has ___________ terminals.

Two
None of these
Three
Four

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Power Electronics
Which of following is not a power transistor?

 COOLMOS.
 IGBTs.
  TRIAC.
 SITS.

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Power Electronics
During reverse recovery time

 charge carrier of junction J3 is swept out.
 charge carrier of junction J1 is swept out.
  both B and C.
 charge carrier of junction J2 recombined.

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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

 140 μs.
 145 μs.
  135 μs.
 130 μs.

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

 600 A.
  200 A.
 400 A.
 20 A.

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Power Electronics
The device that exhibits negative resistance region is ___________.

UJT
Triac
Transistor
Diac

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