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Power Electronics

Power Electronics
The UJT may be used as ___________.

A rectifier
None of these
Am amplifier
A sawtooth generator

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Power Electronics
If the anode current is 800 A, then the amount of current required to turn off the GTO is about

  200 A.
 600 A.
 20 A.
 400 A.

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Power Electronics
The reverse recovery time of diode is trr = 3 μs and the rate off all of the diode current is di/dt = 30 A/μs. The storage charge current QRR is

 130 μs.
 140 μs.
  135 μs.
 145 μs.

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Power Electronics
The typical value of SCR for modern alternator is

 0.5.
 1.0.
 1.5.
 1.2.

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Power Electronics
Anode current in an SCR consists of

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

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Power Electronics
Which of the following is used in SCR to protect from high dV / dt?

 Fuse.
  Snubber circuit.
 Circuit breaker.
 Equalizing circuit.

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