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Power Electronics

Power Electronics
Which of following is normally ON device

  SIT.
 TRIAC.
 IGBT.
 BJT.

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

Both positive and negative
Only positive
Only negative
None of these

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Power Electronics
Anode current in an SCR consists of

  holes only.
  either electron or holes.
  Both electron and holes.
  electrons only.

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Power Electronics
The latching current of GTO should be of order

  500 mA.
 100 mA.
 2 A.
 1 A.

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Power Electronics
Power electronics essentially deals with control of a.c. power at ___________.

Frequencies less than 10 Hz
50 Hz frequency
Frequencies above 1000 kHz
Frequencies above 20 kHz

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Power Electronics
Which semiconductor device acts like a diode and two transistor?

 UJT.
 SCR.
  Triac.
 Diac.

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