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Power Electronics

Power Electronics
A diac is turned on by ___________.

None of these
Gate current
Gate voltage
A breakover voltage

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Power Electronics
A diac has ___________ terminals.

Four
Three
Two
None of these

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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 %.
 90.9 %.
 83.3 %.
  76.3 %.

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Power Electronics
Leakage current flows through the thyristor in

 forward blocking mode.
  both forward and reverse blocking mode.
 forward conduction mode.
 reverse blocking mode.

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Power Electronics
When the temperature increases, the intrinsic stand off ratio ___________.

Essentially remains the same
Increases
Decreases
None of these

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Power Electronics
BCT is used for

  High power phase control.
 High power current control.
 Low power phase control.
 Low power current control.

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MORE MCQ ON Power Electronics

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