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Power Electronics

Power Electronics
Switching frequency of SITH is

 60 KHz.
 10 KHz.
 5 KHz.
  100 KHz.

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Power Electronics
A diac is simply ___________.

None of these
A three junction device
A single junction device
A triac without gate terminal

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Power Electronics
When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________

Is increased
Remains the same
Is decreased
None of these

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Power Electronics
Which of following is normally ON device

  SIT.
 TRIAC.
 IGBT.
 BJT.

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Power Electronics
Thermal voltage VT can be given by

  Kq/T.
 qT/K.
 KT/q.
 (K2/q)(T + 1/T - 1).

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Power Electronics
Which of following is not a power transistor?

 COOLMOS.
 IGBTs.
  TRIAC.
 SITS.

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