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Power Electronics

Power Electronics
A diac has ___________ terminals.

Four
None of these
Three
Two

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Power Electronics
A triac can pass a portion of ___________ half-cycle through the load.

Only negative
Both positive and negative
Only positive
None of these

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Power Electronics
ON state voltage drop across SCR lie between the range

 0 - 0.5 V.
  1 - 1.5 V.
 0.5 - 1 V.
 1.5 - 2 V.

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Power Electronics
60 thyrsistors are connected in series and parallel to form a 10 KV and 5.5 KA switch. Each thyristor is rated for 1.2 KV, 1 KA. The no. of parallel path are 6. The efficiency of the switch is

 91.6 %.
  76.3 %.
 90.9 %.
 83.3 %.

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Power Electronics
Power transistor are type of

 BJTs.
 IGBTs.
  All of above.
 MOSFETs.

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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

 400 A.
 600 A.
 20 A.
  200 A.

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