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Power Electronics

Power Electronics
A triac is a ___________ switch

Bidirectional
Mechanical
None of these
Unidirectional

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Power Electronics
The UJT may be used as ___________.

None of these
Am amplifier
A rectifier
A sawtooth generator

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

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

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Power Electronics
A single phase full bridge inverter can operated in load commutation mode in case load consist of

 RLC critically damped.
 RL.
 RLC underdamped.
 RLC overdamped.

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Power Electronics
Dynamic equalising circuit is useful

 to limit dV / dt of SCR.
 to limit di / dt of SCR.
  both B and C.
 for voltage equalisation.

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

Decreases
Essentially remains the same
Increases
None of these

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