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Power Electronics

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

None of these
Heavily
Lightly
Moderately

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Power Electronics
Figure shows two thyristors rated 400 A sharing a load current. Current through T2 is 180A. Current through T1 will be

 110 A.
 120 A.
  150 A.
 100 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

 140 μs.
 145 μs.
 130 μs.
  135 μs.

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Power Electronics
If holding current of a thyristor is 2 mA then latching current should be

 0.002 A.
  0.004 A.
 0.01 A.
 0.009 A.

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Power Electronics
A power MOSFET has three terminals called

 Collector, emitter and base.
  Drain, source and gate.
 Collector, emitter and gate.
 Drain, source and base.

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Power Electronics
After proper turn on of thyristor

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

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