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Power Electronics

Power Electronics
In a UJT, the p-type emitter is ___________ doped

Moderately
Heavily
Lightly
None of these

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Power Electronics
Anode current in an SCR consists of

  electrons only.
  holes only.
  either electron or holes.
  Both electron and holes.

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Power Electronics
A triac is equivalent to two SCRs ___________.

None of these
In series
In inverse-parallel
In parallel

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Power Electronics
4 thyristors rated 200 V in series. The operating voltage of the string is 0.600 V. Derating factor of the string is

 0.7.
 0.75.
  0.25.
 0.2.

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

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

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Power Electronics
The typical value of SCR for modern alternator is

 1.0.
 1.5.
 1.2.
 0.5.

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