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Power Electronics

Power Electronics
Which of following is not a power transistor?

 IGBTs.
  TRIAC.
 COOLMOS.
 SITS.

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Power Electronics
What is used to protect the SCR from over current ?

 Snubber circuit.
 Voltage clamping device.
 Heat sink.
  CB and fuse.

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Power Electronics
Figure shows two thyristors rated 400 A sharing a load current. Current through T2 is 180A. Current through T1 will be

  150 A.
 110 A.
 100 A.
 120 A.

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Power Electronics
A diac has ___________ semiconductor layers

None of these
Four
Two
Three

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Power Electronics
Calculate the maximum voltage that can be safely blocked by the string shown in figure, if maximum allowable leakage current is 2 mA?

 10 KV.
 2 KV.
 6 KV.
  8 KV.

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Power Electronics
A GTO can be turned on by applying

 Positive source signal.
 Positive drain signal.
  Positive gate signal.
 None of these.

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