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Power Electronics

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

  IGBT.
 FCT.
 MCT.
 GTO.

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Power Electronics
60 thyrsistors are connected in series and parallel to form a 10 KV and 5.5 KA switch. Each thyristor is rated for 1.2 KV, 1 KA. The no. of parallel path are 6. The efficiency of the switch is

  76.3 %.
 90.9 %.
 83.3 %.
 91.6 %.

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Power Electronics
Power transistor are type of

  All of above.
 IGBTs.
 BJTs.
 MOSFETs.

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

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

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Power Electronics
Leakage current flows through the thyristor in

 forward conduction mode.
  both forward and reverse blocking mode.
 forward blocking mode.
 reverse blocking mode.

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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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