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Power Electronics

Power Electronics
A triac is a ___________ switch

Unidirectional
Mechanical
None of these
Bidirectional

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Power Electronics
Which of the following is not a characteristic of UJT?

Intrinsic stand off ratio
Negative resistance
Bilateral conduction
Peak-point voltage

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

 Carbon.
  Aluminium.
 Silver.
 Iron.

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Power Electronics
A modern power semiconductor device that combines the characteristic of BJT and MOSFET is

 MCT.
 FCT.
  IGBT.
 GTO.

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Power Electronics
A power semiconductor may undergo damage due to

 Low di/dt.
  High di/dt.
 High dv/dt.
 Low dv/dt.

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Power Electronics
During which time maximum conduction spreading take place in the thyristor during turn ON?

 Delay time.
 Rise time.
  Spread time.
 Same for every case.

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