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Power Electronics

Power Electronics
A diac is turned on by ___________.

A breakover voltage
Gate voltage
None of these
Gate current

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Power Electronics
Which of following is not a power transistor?

 COOLMOS.
  TRIAC.
 IGBTs.
 SITS.

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

Negative resistance
Saturation
None of these
Cut-off

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Power Electronics
Example of a voltage clamping device

 aluminium block.
  metal oxide varistor.
 snubber circuit.
 fast acting fuse.

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Power Electronics
A diac has ___________ semiconductor layers

None of these
Four
Three
Two

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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.
 400 A.
 20 A.
  200 A.

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