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Power Electronics

Power Electronics
The latching current of GTO should be of order

 1 A.
  500 mA.
 100 mA.
 2 A.

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Power Electronics
A UJT has ___________.

None of these
One pn junction
Three pn junctions
Two pn junctions

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Power Electronics
A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is

 30° to 150°.
 30° to 180°.
 60° to 120°.
 60° to 180°.

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Power Electronics
A diac has ___________ pn junctions

None of these
Two
Four
Three

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Power Electronics
Typical range of thyristor turn OFF time is

 3 - 50 µs.
  3 - 100 µs.
 3 - 10 µs.
 3 - 500 µs.

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Power Electronics
Which of the following is used in heat sink?

  Aluminium.
 Carbon.
 Iron.
 Silver.

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