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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

 20 A.
 600 A.
 400 A.
  200 A.

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Power Electronics
Compared to transistor, ______________ have lower on state conduction losses and higher power handling capability

 TRIACs.
 Semi conductor diodes.
 MOSFETs.
  Thyristor.

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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

  0.32.
  0.27.
  0.45.
  0.67.

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Power Electronics
What may happen high dV / dt?

 Anyone of these.
  Both A and B.
 Breakdown of J2 junction.
 Unwanted turn ON.

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Power Electronics
After peak point, the UJT operates in the ___________ region.

Negative resistance
None of these
Saturation
Cut-off

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Power Electronics
Spread time is defined as the interval during which

  anode current rises from 90 % to its final value.
 both (A) and (B).
 anode voltage drops from 10 % of its initial value to zero.
 anode current rises from 10 % to 90 % of its final value.

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