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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.
  200 A.
 600 A.
 400 A.

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Power Electronics
When the temperature increases, the inter-base resistance (RBB) of a UJT ___________.

Remains the same
Decreases
None of these
Increases

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Power Electronics
Thyristor can be protected from over voltages by using

  voltage clamping device.
 fuse.
 snubber circuit.
 heat sink.

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Power Electronics
Which of the following is used in SCR to protect from high dV / dt?

  Snubber circuit.
 Circuit breaker.
 Equalizing circuit.
 Fuse.

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Power Electronics
During which time maximum conduction spreading take place in the thyristor during turn ON?

 Rise time.
 Delay time.
 Same for every case.
  Spread time.

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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.
  0.32.
  0.67.
  0.27.

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