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Power Electronics

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

 Carbon.
  Aluminium.
 Iron.
 Silver.

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Power Electronics
A diac is simply ___________.

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

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Power Electronics
Which of following is normally ON device

 BJT.
 TRIAC.
  SIT.
 IGBT.

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Power Electronics
To turn on UJT, the forward bias on the emitter diode should be ___________ the peak point voltage.

Equal to
Less than
More than
None of these

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Power Electronics
Which of following is not a power transistor?

 SITS.
  TRIAC.
 IGBTs.
 COOLMOS.

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Power Electronics
A triac has ___________ semiconductor layers.

Five
Two
Three
Four

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