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Power Electronics

Power Electronics
A diac has ___________ semiconductor layers

Four
Three
Two
None of these

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Power Electronics
The function of snubber circuit connected across the SCR is to

  suppress dV / dt.
 decrease dV / dt.
 increase dV / dt.
 decrease di / dt.

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Power Electronics
To meet high current demand we use SCRs in

 both B and C.
 series connection.
 anti parallel connection.
  parallel connection.

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

 Carbon.
 Iron.
  Aluminium.
 Silver.

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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
After proper turn on of thyristor

  gate signal must be removed.
 gate signal is always present.
None of these
 gate signal should present but can be removed.

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