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Power Electronics

Power Electronics
Which of following is normally ON device

 BJT.
  SIT.
 IGBT.
 TRIAC.

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Power Electronics
The latching current of GTO should be of order

  500 mA.
 1 A.
 100 mA.
 2 A.

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Power Electronics
Thyristor is nothing but a

 Controlled transistor.
 Amplifier with large current gain.
  Controlled switch.
 Amplifier with higher gain.

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Power Electronics
The UJT may be used as ___________.

A sawtooth generator
A rectifier
None of these
Am amplifier

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Power Electronics
4 thyristors rated 200 V in series. The operating voltage of the string is 0.600 V. Derating factor of the string is

  0.25.
 0.75.
 0.2.
 0.7.

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Power Electronics
A diac is turned on by ___________.

Gate current
A breakover voltage
None of these
Gate voltage

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