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Power Electronics

Power Electronics
A diac is turned on by ___________.

A breakover voltage
None of these
Gate current
Gate voltage

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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 overdamped.
 RLC underdamped.

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Power Electronics
Which of the following is disadvantage of fast recovery diodes?

 Recovery is only 5 µs.
 Recovery is only 50 µs.
 None of these.
  Doping is carried out.

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Power Electronics
A single phase full bridge inverter can operate in load commutation mode in case load consists of

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

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Power Electronics
After proper turn on of thyristor

  gate signal must be removed.
 gate signal should present but can be removed.
 gate signal is always present.
None of these

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Power Electronics
Thyristor can be protected from over voltages by using

  voltage clamping device.
 fuse.
 snubber circuit.
 heat sink.

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